<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:63e07243-ef43-44bc-a38e-9a0179eb49d0,g:fdb124cc-021f-4f2d-9a04-d8d537addad2-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.avis.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="car-20250630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_30ac78be-a9e1-409e-8502-f6b55d21787c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_23a1e853-6fba-4c73-9bb1-6f36f69ec5b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_30ac78be-a9e1-409e-8502-f6b55d21787c" xlink:to="loc_us-gaap_StatementTable_23a1e853-6fba-4c73-9bb1-6f36f69ec5b5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_c04ce5ec-4fd5-4b26-a6bb-5526caac0455" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_23a1e853-6fba-4c73-9bb1-6f36f69ec5b5" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_c04ce5ec-4fd5-4b26-a6bb-5526caac0455" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_c04ce5ec-4fd5-4b26-a6bb-5526caac0455_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_c04ce5ec-4fd5-4b26-a6bb-5526caac0455" xlink:to="loc_us-gaap_EquityComponentDomain_c04ce5ec-4fd5-4b26-a6bb-5526caac0455_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_934046ca-f7f0-409c-9396-d4f682f21558" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_c04ce5ec-4fd5-4b26-a6bb-5526caac0455" xlink:to="loc_us-gaap_EquityComponentDomain_934046ca-f7f0-409c-9396-d4f682f21558" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_934046ca-f7f0-409c-9396-d4f682f21558" xlink:to="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_9c11a216-86ab-45d2-97dc-0c3cb9b7dbbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:to="loc_us-gaap_CommonStockMember_9c11a216-86ab-45d2-97dc-0c3cb9b7dbbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_6807b44a-25c8-4118-8845-f974133f3d0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_6807b44a-25c8-4118-8845-f974133f3d0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_b5df3d94-958f-4e9a-a2ff-201401ce9bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:to="loc_us-gaap_RetainedEarningsMember_b5df3d94-958f-4e9a-a2ff-201401ce9bf3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_678be752-dbb0-4c91-b7df-02c3d1ec0a11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:to="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_678be752-dbb0-4c91-b7df-02c3d1ec0a11" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_967c8ff6-5a1d-465f-85d4-6b8560720006" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_99be934a-d188-4825-a1bf-2abdf7872054" xlink:to="loc_us-gaap_TreasuryStockCommonMember_967c8ff6-5a1d-465f-85d4-6b8560720006" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_64bd6f32-14a8-4872-897c-b14e92037821" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_934046ca-f7f0-409c-9396-d4f682f21558" xlink:to="loc_us-gaap_NoncontrollingInterestMember_64bd6f32-14a8-4872-897c-b14e92037821" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_30ac78be-a9e1-409e-8502-f6b55d21787c" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_bbf8e415-c3c1-4fce-942f-71823ba90ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_bbf8e415-c3c1-4fce-942f-71823ba90ff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_289a6d83-aa9c-464b-9ef9-4855e9673007" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_289a6d83-aa9c-464b-9ef9-4855e9673007" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_45ab783e-8797-4930-9848-8d630e36dd72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:to="loc_us-gaap_TreasuryStockCommonShares_45ab783e-8797-4930-9848-8d630e36dd72" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract_2a691be8-d33e-47f9-910e-b97a7218fdc4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract_2a691be8-d33e-47f9-910e-b97a7218fdc4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_3b516dee-119d-4c02-8a11-95482e9fe2a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract_2a691be8-d33e-47f9-910e-b97a7218fdc4" xlink:to="loc_us-gaap_ProfitLoss_3b516dee-119d-4c02-8a11-95482e9fe2a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_33cfe11b-df55-485a-9bee-0a9a419b8b73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract_2a691be8-d33e-47f9-910e-b97a7218fdc4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_33cfe11b-df55-485a-9bee-0a9a419b8b73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_173670c7-1fc8-4000-9b65-1fdd76327c29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAbstract_2a691be8-d33e-47f9-910e-b97a7218fdc4" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_173670c7-1fc8-4000-9b65-1fdd76327c29" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_bffe122c-404a-4127-bc54-d11407a6b3a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_bffe122c-404a-4127-bc54-d11407a6b3a2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_84b18749-fcc0-40b2-8616-47446e63ee3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_73d127fa-598c-4a1d-ba42-1fe0fcfb80eb" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_84b18749-fcc0-40b2-8616-47446e63ee3b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_d64ad74d-cc34-4037-be6b-b9dc8d9a67fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2449cb82-a19f-4f23-8d91-1d16edd9a431" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_fd860101-cc33-4f3a-b4bf-88249f68bd2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/BasisofPresentationNarrativeDetails" xlink:type="simple" xlink:href="car-20250630.xsd#BasisofPresentationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/BasisofPresentationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_0ffc0b2f-2621-4cf2-b025-2665421fa85e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_05758996-b980-46ec-ae9b-987c4297d4fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ffc0b2f-2621-4cf2-b025-2665421fa85e" xlink:to="loc_us-gaap_DebtInstrumentTable_05758996-b980-46ec-ae9b-987c4297d4fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_a3f3e745-f408-4af3-bda9-328fdb143c67" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_05758996-b980-46ec-ae9b-987c4297d4fd" xlink:to="loc_srt_ProductOrServiceAxis_a3f3e745-f408-4af3-bda9-328fdb143c67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a3f3e745-f408-4af3-bda9-328fdb143c67_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_a3f3e745-f408-4af3-bda9-328fdb143c67" xlink:to="loc_srt_ProductsAndServicesDomain_a3f3e745-f408-4af3-bda9-328fdb143c67_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_1655b326-b4a0-4e26-bcfc-b71a7ae5a85a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_a3f3e745-f408-4af3-bda9-328fdb143c67" xlink:to="loc_srt_ProductsAndServicesDomain_1655b326-b4a0-4e26-bcfc-b71a7ae5a85a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RoyaltyMember_6ec58dd2-ac5a-4397-be73-b41176b71a63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RoyaltyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1655b326-b4a0-4e26-bcfc-b71a7ae5a85a" xlink:to="loc_us-gaap_RoyaltyMember_6ec58dd2-ac5a-4397-be73-b41176b71a63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_2aa12069-9de2-47b9-8833-3a2661404aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ffc0b2f-2621-4cf2-b025-2665421fa85e" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_2aa12069-9de2-47b9-8833-3a2661404aeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_d1844cca-f6ba-4123-9f43-01c740897fc2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ffc0b2f-2621-4cf2-b025-2665421fa85e" xlink:to="loc_us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment_d1844cca-f6ba-4123-9f43-01c740897fc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9be8c399-8346-43f2-b192-6839d05f458b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0ffc0b2f-2621-4cf2-b025-2665421fa85e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9be8c399-8346-43f2-b192-6839d05f458b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/BasisofPresentationScheduleofDisaggregatedRevenueinBasisofPresentationDetails" xlink:type="simple" xlink:href="car-20250630.xsd#BasisofPresentationScheduleofDisaggregatedRevenueinBasisofPresentationDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/BasisofPresentationScheduleofDisaggregatedRevenueinBasisofPresentationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_381bb451-afec-4cba-aeb2-b275371ff2bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_aafc5f52-ec3f-4749-8425-4b714ce2374e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_381bb451-afec-4cba-aeb2-b275371ff2bf" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_aafc5f52-ec3f-4749-8425-4b714ce2374e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionAxis_968e8ab2-b223-4a7b-b11f-eff79e32edf9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicDistributionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_aafc5f52-ec3f-4749-8425-4b714ce2374e" xlink:to="loc_us-gaap_GeographicDistributionAxis_968e8ab2-b223-4a7b-b11f-eff79e32edf9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionDomain_968e8ab2-b223-4a7b-b11f-eff79e32edf9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicDistributionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GeographicDistributionAxis_968e8ab2-b223-4a7b-b11f-eff79e32edf9" xlink:to="loc_us-gaap_GeographicDistributionDomain_968e8ab2-b223-4a7b-b11f-eff79e32edf9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionDomain_0c708d81-60ec-4d0c-9ab2-ff827a32ebfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicDistributionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GeographicDistributionAxis_968e8ab2-b223-4a7b-b11f-eff79e32edf9" xlink:to="loc_us-gaap_GeographicDistributionDomain_0c708d81-60ec-4d0c-9ab2-ff827a32ebfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_626fb7cc-cc7f-422b-a337-45bcf71b109d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AmericasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_0c708d81-60ec-4d0c-9ab2-ff827a32ebfc" xlink:to="loc_srt_AmericasMember_626fb7cc-cc7f-422b-a337-45bcf71b109d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EMEAMember_b9a12051-512a-4a4d-a5ff-a233060e1b87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EMEAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_0c708d81-60ec-4d0c-9ab2-ff827a32ebfc" xlink:to="loc_us-gaap_EMEAMember_b9a12051-512a-4a4d-a5ff-a233060e1b87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AsiaAndAustralasiaMember_913abccf-d0d4-459b-9c06-47d6e7eb5cf3" xlink:href="car-20250630.xsd#car_AsiaAndAustralasiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_0c708d81-60ec-4d0c-9ab2-ff827a32ebfc" xlink:to="loc_car_AsiaAndAustralasiaMember_913abccf-d0d4-459b-9c06-47d6e7eb5cf3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_b9bdc161-c75e-4107-a930-da621df4ed69" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_aafc5f52-ec3f-4749-8425-4b714ce2374e" xlink:to="loc_srt_ProductOrServiceAxis_b9bdc161-c75e-4107-a930-da621df4ed69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b9bdc161-c75e-4107-a930-da621df4ed69_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_b9bdc161-c75e-4107-a930-da621df4ed69" xlink:to="loc_srt_ProductsAndServicesDomain_b9bdc161-c75e-4107-a930-da621df4ed69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e1a696bd-6548-40c9-83f6-3e695466e98f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_b9bdc161-c75e-4107-a930-da621df4ed69" xlink:to="loc_srt_ProductsAndServicesDomain_e1a696bd-6548-40c9-83f6-3e695466e98f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisMember_10c2deb6-ccb0-41cf-8b5f-f32c601c2ac6" xlink:href="car-20250630.xsd#car_AvisMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e1a696bd-6548-40c9-83f6-3e695466e98f" xlink:to="loc_car_AvisMember_10c2deb6-ccb0-41cf-8b5f-f32c601c2ac6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_BudgetMember_4d640f6d-5b49-4ae5-be26-d7acdda79211" xlink:href="car-20250630.xsd#car_BudgetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e1a696bd-6548-40c9-83f6-3e695466e98f" xlink:to="loc_car_BudgetMember_4d640f6d-5b49-4ae5-be26-d7acdda79211" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_OtherBrandsMember_f3847661-9c1c-4374-ad4d-6abd68033668" xlink:href="car-20250630.xsd#car_OtherBrandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e1a696bd-6548-40c9-83f6-3e695466e98f" xlink:to="loc_car_OtherBrandsMember_f3847661-9c1c-4374-ad4d-6abd68033668" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_e4a8f79a-3a66-430a-a227-411f3d4e3480" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_381bb451-afec-4cba-aeb2-b275371ff2bf" xlink:to="loc_us-gaap_Revenues_e4a8f79a-3a66-430a-a227-411f3d4e3480" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/LeasesScheduleofRevenuesDisaggregatedbyGeographyDetails" xlink:type="simple" xlink:href="car-20250630.xsd#LeasesScheduleofRevenuesDisaggregatedbyGeographyDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/LeasesScheduleofRevenuesDisaggregatedbyGeographyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionLineItems_8c1f38ee-e95d-49ed-87c3-9bd69312991c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionTable_aef007b6-31de-4a7b-89a7-c2c07f7ec3ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_8c1f38ee-e95d-49ed-87c3-9bd69312991c" xlink:to="loc_us-gaap_LessorLeaseDescriptionTable_aef007b6-31de-4a7b-89a7-c2c07f7ec3ae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionAxis_080df7f6-96ee-4380-9e72-2888f7dc75f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicDistributionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LessorLeaseDescriptionTable_aef007b6-31de-4a7b-89a7-c2c07f7ec3ae" xlink:to="loc_us-gaap_GeographicDistributionAxis_080df7f6-96ee-4380-9e72-2888f7dc75f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionDomain_080df7f6-96ee-4380-9e72-2888f7dc75f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicDistributionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GeographicDistributionAxis_080df7f6-96ee-4380-9e72-2888f7dc75f5" xlink:to="loc_us-gaap_GeographicDistributionDomain_080df7f6-96ee-4380-9e72-2888f7dc75f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicDistributionDomain_7419d767-3e2e-4bc8-bcc8-48d8b21a447a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeographicDistributionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GeographicDistributionAxis_080df7f6-96ee-4380-9e72-2888f7dc75f5" xlink:to="loc_us-gaap_GeographicDistributionDomain_7419d767-3e2e-4bc8-bcc8-48d8b21a447a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_e754d31b-2b4d-45f4-b4ae-fbaae13f7e96" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AmericasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_7419d767-3e2e-4bc8-bcc8-48d8b21a447a" xlink:to="loc_srt_AmericasMember_e754d31b-2b4d-45f4-b4ae-fbaae13f7e96" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EMEAMember_fed6d83f-d488-47d8-b364-23b098d1478e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EMEAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_7419d767-3e2e-4bc8-bcc8-48d8b21a447a" xlink:to="loc_us-gaap_EMEAMember_fed6d83f-d488-47d8-b364-23b098d1478e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AsiaAndAustralasiaMember_9a34f0f8-cfe2-456c-b622-4f5c6bce9868" xlink:href="car-20250630.xsd#car_AsiaAndAustralasiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GeographicDistributionDomain_7419d767-3e2e-4bc8-bcc8-48d8b21a447a" xlink:to="loc_car_AsiaAndAustralasiaMember_9a34f0f8-cfe2-456c-b622-4f5c6bce9868" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8afc8b21-e254-4515-a8ee-9acc0b07bf14" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LessorLeaseDescriptionTable_aef007b6-31de-4a7b-89a7-c2c07f7ec3ae" xlink:to="loc_srt_ProductOrServiceAxis_8afc8b21-e254-4515-a8ee-9acc0b07bf14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8afc8b21-e254-4515-a8ee-9acc0b07bf14_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8afc8b21-e254-4515-a8ee-9acc0b07bf14" xlink:to="loc_srt_ProductsAndServicesDomain_8afc8b21-e254-4515-a8ee-9acc0b07bf14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cbae9caf-9f28-4476-adc7-678898905908" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8afc8b21-e254-4515-a8ee-9acc0b07bf14" xlink:to="loc_srt_ProductsAndServicesDomain_cbae9caf-9f28-4476-adc7-678898905908" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisMember_a6d33691-a3d1-4815-b54f-7088fe8e4f7b" xlink:href="car-20250630.xsd#car_AvisMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cbae9caf-9f28-4476-adc7-678898905908" xlink:to="loc_car_AvisMember_a6d33691-a3d1-4815-b54f-7088fe8e4f7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_BudgetMember_365c9da0-ffe2-4ef7-bcd3-c487d7f66a1b" xlink:href="car-20250630.xsd#car_BudgetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cbae9caf-9f28-4476-adc7-678898905908" xlink:to="loc_car_BudgetMember_365c9da0-ffe2-4ef7-bcd3-c487d7f66a1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_OtherBrandsMember_f69c3239-d92c-45d0-94dd-7f953bf4d581" xlink:href="car-20250630.xsd#car_OtherBrandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cbae9caf-9f28-4476-adc7-678898905908" xlink:to="loc_car_OtherBrandsMember_f69c3239-d92c-45d0-94dd-7f953bf4d581" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncome_78f9c4d9-38af-48bc-a57a-dc2fed9ea2aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_8c1f38ee-e95d-49ed-87c3-9bd69312991c" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncome_78f9c4d9-38af-48bc-a57a-dc2fed9ea2aa" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/RestructuringandOtherRelatedChargesNarrativeDetails" xlink:type="simple" xlink:href="car-20250630.xsd#RestructuringandOtherRelatedChargesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/RestructuringandOtherRelatedChargesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_6397374a-4700-4364-854a-bd34b535ee9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf782a58-bd10-4995-8463-39b046bb60b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_6397374a-4700-4364-854a-bd34b535ee9f" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf782a58-bd10-4995-8463-39b046bb60b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_1f357c3b-a029-453c-bedb-52a75ae6c445" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf782a58-bd10-4995-8463-39b046bb60b7" xlink:to="loc_us-gaap_RestructuringPlanAxis_1f357c3b-a029-453c-bedb-52a75ae6c445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_1f357c3b-a029-453c-bedb-52a75ae6c445_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_1f357c3b-a029-453c-bedb-52a75ae6c445" xlink:to="loc_us-gaap_RestructuringPlanDomain_1f357c3b-a029-453c-bedb-52a75ae6c445_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_72a65ddb-29e5-4ff0-88cb-f197881f7fba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_1f357c3b-a029-453c-bedb-52a75ae6c445" xlink:to="loc_us-gaap_RestructuringPlanDomain_72a65ddb-29e5-4ff0-88cb-f197881f7fba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_GlobalRightsizingMember_61e058cf-8eed-470f-896c-313466461118" xlink:href="car-20250630.xsd#car_GlobalRightsizingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_72a65ddb-29e5-4ff0-88cb-f197881f7fba" xlink:to="loc_car_GlobalRightsizingMember_61e058cf-8eed-470f-896c-313466461118" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_475a1a09-4768-49c1-91be-3c61a8e42f6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_bf782a58-bd10-4995-8463-39b046bb60b7" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_475a1a09-4768-49c1-91be-3c61a8e42f6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_475a1a09-4768-49c1-91be-3c61a8e42f6e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_475a1a09-4768-49c1-91be-3c61a8e42f6e" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_475a1a09-4768-49c1-91be-3c61a8e42f6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_78ef984c-79ce-445d-8f38-fc8b1dcdd497" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_475a1a09-4768-49c1-91be-3c61a8e42f6e" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_78ef984c-79ce-445d-8f38-fc8b1dcdd497" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EmployeeSeparationMember_0f5fac21-c991-4631-b23a-1ae9cfc0fca6" xlink:href="car-20250630.xsd#car_EmployeeSeparationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_78ef984c-79ce-445d-8f38-fc8b1dcdd497" xlink:to="loc_car_EmployeeSeparationMember_0f5fac21-c991-4631-b23a-1ae9cfc0fca6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_cfa59895-6409-4e3a-b595-13f55a8e0383" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_6397374a-4700-4364-854a-bd34b535ee9f" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_cfa59895-6409-4e3a-b595-13f55a8e0383" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_dc210653-7841-44e8-b2cf-67965d6d6710" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_6397374a-4700-4364-854a-bd34b535ee9f" xlink:to="loc_us-gaap_RestructuringCharges_dc210653-7841-44e8-b2cf-67965d6d6710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_71f2472d-1056-4b49-9848-34a35c7bcca9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_6397374a-4700-4364-854a-bd34b535ee9f" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_71f2472d-1056-4b49-9848-34a35c7bcca9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/RestructuringandOtherRelatedChargesScheduleofChangestoRestructuringRelatedLiabilitiesDetails" xlink:type="simple" xlink:href="car-20250630.xsd#RestructuringandOtherRelatedChargesScheduleofChangestoRestructuringRelatedLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/RestructuringandOtherRelatedChargesScheduleofChangestoRestructuringRelatedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_2dee450a-418e-42d8-8038-e0cbe97af7f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8aa2ebb8-235e-4d09-aecf-f05d704d54f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_2dee450a-418e-42d8-8038-e0cbe97af7f4" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8aa2ebb8-235e-4d09-aecf-f05d704d54f8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_12ef30d9-3572-4241-8ae1-7f471572b2f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8aa2ebb8-235e-4d09-aecf-f05d704d54f8" xlink:to="loc_us-gaap_RestructuringPlanAxis_12ef30d9-3572-4241-8ae1-7f471572b2f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_12ef30d9-3572-4241-8ae1-7f471572b2f9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_12ef30d9-3572-4241-8ae1-7f471572b2f9" xlink:to="loc_us-gaap_RestructuringPlanDomain_12ef30d9-3572-4241-8ae1-7f471572b2f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_3ad67a38-a4ab-47d8-9ce4-788372028b27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_12ef30d9-3572-4241-8ae1-7f471572b2f9" xlink:to="loc_us-gaap_RestructuringPlanDomain_3ad67a38-a4ab-47d8-9ce4-788372028b27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_GlobalRightsizingMember_b213d694-5c12-4428-9d84-403d733c23c3" xlink:href="car-20250630.xsd#car_GlobalRightsizingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_3ad67a38-a4ab-47d8-9ce4-788372028b27" xlink:to="loc_car_GlobalRightsizingMember_b213d694-5c12-4428-9d84-403d733c23c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_CostOptimizationMember_bab49385-69e3-49ea-92d7-0a051ce30446" xlink:href="car-20250630.xsd#car_CostOptimizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_3ad67a38-a4ab-47d8-9ce4-788372028b27" xlink:to="loc_car_CostOptimizationMember_bab49385-69e3-49ea-92d7-0a051ce30446" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_7287cdbf-f361-4b19-9fba-0870f90f3460" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8aa2ebb8-235e-4d09-aecf-f05d704d54f8" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_7287cdbf-f361-4b19-9fba-0870f90f3460" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_7287cdbf-f361-4b19-9fba-0870f90f3460_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_7287cdbf-f361-4b19-9fba-0870f90f3460" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_7287cdbf-f361-4b19-9fba-0870f90f3460_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_7bae9a27-343e-4870-9e06-7371a7e2f937" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_7287cdbf-f361-4b19-9fba-0870f90f3460" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_7bae9a27-343e-4870-9e06-7371a7e2f937" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_081b3827-630e-430e-8bca-60a961ebb13a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_7bae9a27-343e-4870-9e06-7371a7e2f937" xlink:to="loc_us-gaap_EmployeeSeveranceMember_081b3827-630e-430e-8bca-60a961ebb13a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FacilityClosingMember_95574e39-964e-4dcc-8bdf-518bf44a8a65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FacilityClosingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_7bae9a27-343e-4870-9e06-7371a7e2f937" xlink:to="loc_us-gaap_FacilityClosingMember_95574e39-964e-4dcc-8bdf-518bf44a8a65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_8c3176ec-1456-4167-b023-a43f5da9b771" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_7bae9a27-343e-4870-9e06-7371a7e2f937" xlink:to="loc_us-gaap_OtherRestructuringMember_8c3176ec-1456-4167-b023-a43f5da9b771" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_b5130ead-0768-48a1-8142-c62c33c9d5c7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8aa2ebb8-235e-4d09-aecf-f05d704d54f8" xlink:to="loc_srt_StatementGeographicalAxis_b5130ead-0768-48a1-8142-c62c33c9d5c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_b5130ead-0768-48a1-8142-c62c33c9d5c7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_b5130ead-0768-48a1-8142-c62c33c9d5c7" xlink:to="loc_srt_SegmentGeographicalDomain_b5130ead-0768-48a1-8142-c62c33c9d5c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_c49277b1-6ce4-4f17-8ffb-5fdbb6319553" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_b5130ead-0768-48a1-8142-c62c33c9d5c7" xlink:to="loc_srt_SegmentGeographicalDomain_c49277b1-6ce4-4f17-8ffb-5fdbb6319553" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AmericasMember_a8379c3d-085e-4512-8025-d261b93abec7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AmericasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c49277b1-6ce4-4f17-8ffb-5fdbb6319553" xlink:to="loc_srt_AmericasMember_a8379c3d-085e-4512-8025-d261b93abec7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalMember_37afcaa2-dc84-49f4-b752-a9f6505f5ac6" xlink:href="car-20250630.xsd#car_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c49277b1-6ce4-4f17-8ffb-5fdbb6319553" xlink:to="loc_car_InternationalMember_37afcaa2-dc84-49f4-b752-a9f6505f5ac6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_86250354-c2fc-4bbb-ab05-22c440d7c962" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_2dee450a-418e-42d8-8038-e0cbe97af7f4" xlink:to="loc_us-gaap_RestructuringReserveRollForward_86250354-c2fc-4bbb-ab05-22c440d7c962" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_2ff78461-913b-4298-86f0-ec2ed6380203" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_86250354-c2fc-4bbb-ab05-22c440d7c962" xlink:to="loc_us-gaap_RestructuringReserve_2ff78461-913b-4298-86f0-ec2ed6380203" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_f4830689-5bf5-4c10-9c14-56e0bef0c5c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_86250354-c2fc-4bbb-ab05-22c440d7c962" xlink:to="loc_us-gaap_RestructuringCharges_f4830689-5bf5-4c10-9c14-56e0bef0c5c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_RestructuringAndRelatedCostPaymentsUtilization_fd24f886-c0dc-4ec0-977f-566cbe293d17" xlink:href="car-20250630.xsd#car_RestructuringAndRelatedCostPaymentsUtilization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_86250354-c2fc-4bbb-ab05-22c440d7c962" xlink:to="loc_car_RestructuringAndRelatedCostPaymentsUtilization_fd24f886-c0dc-4ec0-977f-566cbe293d17" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_e6499c7c-e4e7-4db2-a676-aa16c59312bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserve"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="car-20250630.xsd#EarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_fe536f01-63e4-4332-aa46-4ecb6c412d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_c163fa5d-753a-4532-a89f-31788fbd72ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_fe536f01-63e4-4332-aa46-4ecb6c412d2e" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_c163fa5d-753a-4532-a89f-31788fbd72ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_38bb4f4f-11c6-4ad8-bc4f-40a83abbc1c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_c163fa5d-753a-4532-a89f-31788fbd72ee" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_38bb4f4f-11c6-4ad8-bc4f-40a83abbc1c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_38bb4f4f-11c6-4ad8-bc4f-40a83abbc1c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_38bb4f4f-11c6-4ad8-bc4f-40a83abbc1c5" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_38bb4f4f-11c6-4ad8-bc4f-40a83abbc1c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8c82c3dc-088a-4322-a3df-bf6ba79a3633" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_38bb4f4f-11c6-4ad8-bc4f-40a83abbc1c5" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8c82c3dc-088a-4322-a3df-bf6ba79a3633" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_f7ad2e2b-6181-4d01-a195-d46ea1a5519d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_8c82c3dc-088a-4322-a3df-bf6ba79a3633" xlink:to="loc_us-gaap_StockCompensationPlanMember_f7ad2e2b-6181-4d01-a195-d46ea1a5519d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_e2848693-d9a8-461d-891a-c16414162877" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_fe536f01-63e4-4332-aa46-4ecb6c412d2e" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_e2848693-d9a8-461d-891a-c16414162877" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/IntangibleAssetsScheduleofIntangibleAssetsDetails" xlink:type="simple" xlink:href="car-20250630.xsd#IntangibleAssetsScheduleofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/IntangibleAssetsScheduleofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_348d9e73-79d9-4eef-99d8-b315333a526d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_33909012-20f5-4b78-b778-ba0075a1bc21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_348d9e73-79d9-4eef-99d8-b315333a526d" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_33909012-20f5-4b78-b778-ba0075a1bc21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_dd43c187-fd24-4e54-90e6-a26944a4c9b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_33909012-20f5-4b78-b778-ba0075a1bc21" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_dd43c187-fd24-4e54-90e6-a26944a4c9b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_dd43c187-fd24-4e54-90e6-a26944a4c9b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_dd43c187-fd24-4e54-90e6-a26944a4c9b2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_dd43c187-fd24-4e54-90e6-a26944a4c9b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_245db10b-1a76-4eeb-8bc5-d602ccfcb6d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_dd43c187-fd24-4e54-90e6-a26944a4c9b2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_245db10b-1a76-4eeb-8bc5-d602ccfcb6d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicensingAgreementsMember_d9c5bd75-3f39-4ebd-8043-36f3b67df678" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LicensingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_245db10b-1a76-4eeb-8bc5-d602ccfcb6d7" xlink:to="loc_us-gaap_LicensingAgreementsMember_d9c5bd75-3f39-4ebd-8043-36f3b67df678" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_a0a0485a-bb4e-4978-813a-c2de937f105e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_245db10b-1a76-4eeb-8bc5-d602ccfcb6d7" xlink:to="loc_us-gaap_CustomerRelationshipsMember_a0a0485a-bb4e-4978-813a-c2de937f105e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_68a56c99-36cc-468f-a5b9-3555124bffb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_245db10b-1a76-4eeb-8bc5-d602ccfcb6d7" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_68a56c99-36cc-468f-a5b9-3555124bffb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_0b1274f1-35db-464b-80dd-65af852cf2df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_348d9e73-79d9-4eef-99d8-b315333a526d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_0b1274f1-35db-464b-80dd-65af852cf2df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_17caa370-52db-4efc-841b-c3e80123157b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_348d9e73-79d9-4eef-99d8-b315333a526d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_17caa370-52db-4efc-841b-c3e80123157b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5385773f-591d-4299-b9be-2ebcf8a79c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_348d9e73-79d9-4eef-99d8-b315333a526d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5385773f-591d-4299-b9be-2ebcf8a79c1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_df829c7e-0dc7-48ca-84f5-da14ed5e7a47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_2583b742-4be7-46e1-be0c-308911da92a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_df829c7e-0dc7-48ca-84f5-da14ed5e7a47" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_2583b742-4be7-46e1-be0c-308911da92a9" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_569f41a0-d0dd-4822-aacb-a253dd22cb07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_2583b742-4be7-46e1-be0c-308911da92a9" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_569f41a0-d0dd-4822-aacb-a253dd22cb07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_569f41a0-d0dd-4822-aacb-a253dd22cb07_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_569f41a0-d0dd-4822-aacb-a253dd22cb07" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_569f41a0-d0dd-4822-aacb-a253dd22cb07_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_96a955dc-6a6d-41d5-baca-a2f72fd347dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_569f41a0-d0dd-4822-aacb-a253dd22cb07" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_96a955dc-6a6d-41d5-baca-a2f72fd347dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_e6fe46ab-c558-4bc2-ae29-7278fb5d39c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_96a955dc-6a6d-41d5-baca-a2f72fd347dc" xlink:to="loc_us-gaap_TrademarksMember_e6fe46ab-c558-4bc2-ae29-7278fb5d39c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_78e727da-6765-46e8-b0e5-2713917ecdac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_df829c7e-0dc7-48ca-84f5-da14ed5e7a47" xlink:to="loc_us-gaap_Goodwill_78e727da-6765-46e8-b0e5-2713917ecdac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_64176607-c866-4c12-befd-0101d26836f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_df829c7e-0dc7-48ca-84f5-da14ed5e7a47" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_64176607-c866-4c12-befd-0101d26836f4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/LongtermCorporateDebtandBorrowingArrangementsScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="car-20250630.xsd#LongtermCorporateDebtandBorrowingArrangementsScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/LongtermCorporateDebtandBorrowingArrangementsScheduleofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_0abf9005-c061-4822-aa4f-f911328d3e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DebtInstrumentTable_0abf9005-c061-4822-aa4f-f911328d3e4e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_d86fff05-ff2d-460b-94f1-b4341ff47552" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0abf9005-c061-4822-aa4f-f911328d3e4e" xlink:to="loc_us-gaap_DebtInstrumentAxis_d86fff05-ff2d-460b-94f1-b4341ff47552" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d86fff05-ff2d-460b-94f1-b4341ff47552_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_d86fff05-ff2d-460b-94f1-b4341ff47552" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d86fff05-ff2d-460b-94f1-b4341ff47552_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_d86fff05-ff2d-460b-94f1-b4341ff47552" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FivePointSevenFivePercentSeniorNotesDue2027Member_d2efcc4d-de22-4211-a15b-19dbb6468be4" xlink:href="car-20250630.xsd#car_FivePointSevenFivePercentSeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_FivePointSevenFivePercentSeniorNotesDue2027Member_d2efcc4d-de22-4211-a15b-19dbb6468be4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FourPointSevenFivePercentSeniorNotesDue2028Member_652f6222-1fe7-4e61-bce4-74fcd2b69bb4" xlink:href="car-20250630.xsd#car_FourPointSevenFivePercentSeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_FourPointSevenFivePercentSeniorNotesDue2028Member_652f6222-1fe7-4e61-bce4-74fcd2b69bb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SevenPointPerentEuroDenominatedSeniorNotesDue2029Member_6285806b-8113-4a95-ba41-3b0fa7a48375" xlink:href="car-20250630.xsd#car_SevenPointPerentEuroDenominatedSeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_SevenPointPerentEuroDenominatedSeniorNotesDue2029Member_6285806b-8113-4a95-ba41-3b0fa7a48375" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FivePointThreeSevenFivePercentSeniorNotesDue2029Member_3982e1f3-cf33-4175-be8c-b06e7f13d8da" xlink:href="car-20250630.xsd#car_FivePointThreeSevenFivePercentSeniorNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_FivePointThreeSevenFivePercentSeniorNotesDue2029Member_3982e1f3-cf33-4175-be8c-b06e7f13d8da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EightPointTwoFivePercentSeniorNotesDue2030Member_907eb9d5-9057-4e3a-a1e0-b21b21dac920" xlink:href="car-20250630.xsd#car_EightPointTwoFivePercentSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_EightPointTwoFivePercentSeniorNotesDue2030Member_907eb9d5-9057-4e3a-a1e0-b21b21dac920" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SevenPointTwoFiveEuroDenominatedSeniorNotesDue2030Member_00c2e2c6-e396-4b75-be5b-2810b56ca2c8" xlink:href="car-20250630.xsd#car_SevenPointTwoFiveEuroDenominatedSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_SevenPointTwoFiveEuroDenominatedSeniorNotesDue2030Member_00c2e2c6-e396-4b75-be5b-2810b56ca2c8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EightPointZeroPercentSeniorNotesDue2031Member_c0b6c0f3-cd2e-4d04-b77d-e84bf26028af" xlink:href="car-20250630.xsd#car_EightPointZeroPercentSeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_EightPointZeroPercentSeniorNotesDue2031Member_c0b6c0f3-cd2e-4d04-b77d-e84bf26028af" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EightPointThreeSevenFiveSeniorNotesDue2032Member_3e24999e-eeb8-47bc-8e19-5a0724057a41" xlink:href="car-20250630.xsd#car_EightPointThreeSevenFiveSeniorNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_EightPointThreeSevenFiveSeniorNotesDue2032Member_3e24999e-eeb8-47bc-8e19-5a0724057a41" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FloatingRateTermLoanDueAugustTwoThousandTwentySevenMember_29dae053-adb2-47c8-bf3a-30c89495d95f" xlink:href="car-20250630.xsd#car_FloatingRateTermLoanDueAugustTwoThousandTwentySevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_FloatingRateTermLoanDueAugustTwoThousandTwentySevenMember_29dae053-adb2-47c8-bf3a-30c89495d95f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FloatingRateTermLoanDueJulyTwoThousandThirtyTwoMember_7080782c-2ed7-4ba0-b464-e45a2b23999c" xlink:href="car-20250630.xsd#car_FloatingRateTermLoanDueJulyTwoThousandThirtyTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f6c8655d-c3d4-4dc3-87fd-932458965283" xlink:to="loc_car_FloatingRateTermLoanDueJulyTwoThousandThirtyTwoMember_7080782c-2ed7-4ba0-b464-e45a2b23999c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_2d5cc6e2-8be2-4064-82de-f363615c48ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0abf9005-c061-4822-aa4f-f911328d3e4e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_2d5cc6e2-8be2-4064-82de-f363615c48ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2d5cc6e2-8be2-4064-82de-f363615c48ce_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2d5cc6e2-8be2-4064-82de-f363615c48ce" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2d5cc6e2-8be2-4064-82de-f363615c48ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c203e29f-1fee-4504-89a2-b451d50ed050" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2d5cc6e2-8be2-4064-82de-f363615c48ce" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c203e29f-1fee-4504-89a2-b451d50ed050" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_d8e29fee-c5ab-4878-a9bd-9a0d4333705a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_c203e29f-1fee-4504-89a2-b451d50ed050" xlink:to="loc_us-gaap_SeniorNotesMember_d8e29fee-c5ab-4878-a9bd-9a0d4333705a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableMember_923791f4-7600-4b71-b889-4a364706b8c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_c203e29f-1fee-4504-89a2-b451d50ed050" xlink:to="loc_us-gaap_LoansPayableMember_923791f4-7600-4b71-b889-4a364706b8c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_b327274d-ec55-4397-afbd-846b712b97e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_0abf9005-c061-4822-aa4f-f911328d3e4e" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_b327274d-ec55-4397-afbd-846b712b97e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_b327274d-ec55-4397-afbd-846b712b97e4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_b327274d-ec55-4397-afbd-846b712b97e4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_b327274d-ec55-4397-afbd-846b712b97e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_33062121-910d-4f26-b865-a21b83174728" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_b327274d-ec55-4397-afbd-846b712b97e4" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_33062121-910d-4f26-b865-a21b83174728" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_b4b075b6-0c48-4400-8c02-a697f6c26a66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_33062121-910d-4f26-b865-a21b83174728" xlink:to="loc_us-gaap_SubsequentEventMember_b4b075b6-0c48-4400-8c02-a697f6c26a66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2afed1dd-789f-44d1-8076-15125000236f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2afed1dd-789f-44d1-8076-15125000236f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_247aa193-5ac3-4779-89c0-802eb222aa02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_247aa193-5ac3-4779-89c0-802eb222aa02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermDebt_200ae034-8a4b-4db4-bfbc-d1b2b3f50f76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_OtherLongTermDebt_200ae034-8a4b-4db4-bfbc-d1b2b3f50f76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_09e7b820-3ff5-4d03-b16b-6e21631d419c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_09e7b820-3ff5-4d03-b16b-6e21631d419c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_ce27dfe1-c344-4f2c-ab36-ca6fe72e53dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DebtAndCapitalLeaseObligations_ce27dfe1-c344-4f2c-ab36-ca6fe72e53dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_ab3bf40f-8a13-47c1-b41c-2c5ee1047b73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_ShortTermBorrowings_ab3bf40f-8a13-47c1-b41c-2c5ee1047b73" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredLongTermDebt_7085fd6b-92cc-4671-8b8b-ddd199a3c7a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_SecuredLongTermDebt_7085fd6b-92cc-4671-8b8b-ddd199a3c7a8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_f13c97a7-5f85-4271-b692-117392783d43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_f13c97a7-5f85-4271-b692-117392783d43" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_bedbe6c0-a880-43b8-a9f3-60d390d8f812" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_bedbe6c0-a880-43b8-a9f3-60d390d8f812" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_54f9e462-facf-4d6c-a61a-d74096c1016d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_54f9e462-facf-4d6c-a61a-d74096c1016d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAmountOfHedgedItem_598468c7-f837-43f6-9873-edd109a269c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAmountOfHedgedItem"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DerivativeAmountOfHedgedItem_598468c7-f837-43f6-9873-edd109a269c7" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_da51971e-9c1a-4d84-a1e2-1132b0da7f99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFixedInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f55dc5d3-14c0-48bb-b915-654befdb58ca" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_da51971e-9c1a-4d84-a1e2-1132b0da7f99" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/LongtermCorporateDebtandBorrowingArrangementsNarrativeDetails" xlink:type="simple" xlink:href="car-20250630.xsd#LongtermCorporateDebtandBorrowingArrangementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/LongtermCorporateDebtandBorrowingArrangementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_8435e358-74b9-429e-99c6-e62804852e48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:to="loc_us-gaap_DebtInstrumentTable_8435e358-74b9-429e-99c6-e62804852e48" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_a62252f0-aad2-45a0-9641-530364806d19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8435e358-74b9-429e-99c6-e62804852e48" xlink:to="loc_us-gaap_DebtInstrumentAxis_a62252f0-aad2-45a0-9641-530364806d19" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a62252f0-aad2-45a0-9641-530364806d19_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_a62252f0-aad2-45a0-9641-530364806d19" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a62252f0-aad2-45a0-9641-530364806d19_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7a439925-ad8a-445e-9c47-0cf2345d8235" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_a62252f0-aad2-45a0-9641-530364806d19" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7a439925-ad8a-445e-9c47-0cf2345d8235" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FloatingRateTermLoanDueDecemberTwoThousandTwentyFiveMember_e13fdc12-f832-443c-b3b5-a936321f931b" xlink:href="car-20250630.xsd#car_FloatingRateTermLoanDueDecemberTwoThousandTwentyFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7a439925-ad8a-445e-9c47-0cf2345d8235" xlink:to="loc_car_FloatingRateTermLoanDueDecemberTwoThousandTwentyFiveMember_e13fdc12-f832-443c-b3b5-a936321f931b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EightPointThreeSevenFiveSeniorNotesDue2032Member_e398b1fb-de0c-4f27-aca8-f2ccd8e3b25c" xlink:href="car-20250630.xsd#car_EightPointThreeSevenFiveSeniorNotesDue2032Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7a439925-ad8a-445e-9c47-0cf2345d8235" xlink:to="loc_car_EightPointThreeSevenFiveSeniorNotesDue2032Member_e398b1fb-de0c-4f27-aca8-f2ccd8e3b25c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FivePointSevenFivePercentSeniorNotesDue2027Member_4c3a83aa-ca75-4bd7-86bb-f12763c6831e" xlink:href="car-20250630.xsd#car_FivePointSevenFivePercentSeniorNotesDue2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7a439925-ad8a-445e-9c47-0cf2345d8235" xlink:to="loc_car_FivePointSevenFivePercentSeniorNotesDue2027Member_4c3a83aa-ca75-4bd7-86bb-f12763c6831e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_17cfeebf-c065-4a07-87e5-ac4e450bdbd9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8435e358-74b9-429e-99c6-e62804852e48" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_17cfeebf-c065-4a07-87e5-ac4e450bdbd9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_17cfeebf-c065-4a07-87e5-ac4e450bdbd9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_17cfeebf-c065-4a07-87e5-ac4e450bdbd9" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_17cfeebf-c065-4a07-87e5-ac4e450bdbd9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8cdb8824-fcd4-41a8-87c4-3bea480c458a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_17cfeebf-c065-4a07-87e5-ac4e450bdbd9" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8cdb8824-fcd4-41a8-87c4-3bea480c458a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableMember_08a3e676-9efd-4349-aae8-22810ddb79d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8cdb8824-fcd4-41a8-87c4-3bea480c458a" xlink:to="loc_us-gaap_LoansPayableMember_08a3e676-9efd-4349-aae8-22810ddb79d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_5a9f0861-c639-4bfd-bef6-147109f8c7a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8cdb8824-fcd4-41a8-87c4-3bea480c458a" xlink:to="loc_us-gaap_SeniorNotesMember_5a9f0861-c639-4bfd-bef6-147109f8c7a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_be994e3a-f6ab-472e-ad53-89a2fc7b0391" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8cdb8824-fcd4-41a8-87c4-3bea480c458a" xlink:to="loc_us-gaap_LineOfCreditMember_be994e3a-f6ab-472e-ad53-89a2fc7b0391" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_65b3ad7b-ca88-4004-91b3-616b95b0dbea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8435e358-74b9-429e-99c6-e62804852e48" xlink:to="loc_us-gaap_CreditFacilityAxis_65b3ad7b-ca88-4004-91b3-616b95b0dbea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_65b3ad7b-ca88-4004-91b3-616b95b0dbea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_65b3ad7b-ca88-4004-91b3-616b95b0dbea" xlink:to="loc_us-gaap_CreditFacilityDomain_65b3ad7b-ca88-4004-91b3-616b95b0dbea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_f00e5bda-1064-450f-b525-501539ac9e00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_65b3ad7b-ca88-4004-91b3-616b95b0dbea" xlink:to="loc_us-gaap_CreditFacilityDomain_f00e5bda-1064-450f-b525-501539ac9e00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SBLCFacilityMember_389cc461-fefa-47ac-9a0d-09f0b5beca31" xlink:href="car-20250630.xsd#car_SBLCFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_f00e5bda-1064-450f-b525-501539ac9e00" xlink:to="loc_car_SBLCFacilityMember_389cc461-fefa-47ac-9a0d-09f0b5beca31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_0f2b10d7-fa54-49f7-b8a6-0e8d8082a2e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_0f2b10d7-fa54-49f7-b8a6-0e8d8082a2e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_6d7dae78-f610-44ec-ac76-db9137be8768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_6d7dae78-f610-44ec-ac76-db9137be8768" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchaseAmount_f0041454-f3b7-49b3-8978-08865e8687ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRepurchaseAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:to="loc_us-gaap_DebtInstrumentRepurchaseAmount_f0041454-f3b7-49b3-8978-08865e8687ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_15c431cf-9d34-489a-b1eb-2b396e2d5a48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_15c431cf-9d34-489a-b1eb-2b396e2d5a48" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_aa3ad264-9fec-420e-acc8-8efc9547a88b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7ad23c0e-3a21-4a09-8aa4-8c0e66c3410b" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_aa3ad264-9fec-420e-acc8-8efc9547a88b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/LongtermCorporateDebtandBorrowingArrangementsScheduleofCommittedCreditFacilitiesDetails" xlink:type="simple" xlink:href="car-20250630.xsd#LongtermCorporateDebtandBorrowingArrangementsScheduleofCommittedCreditFacilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/LongtermCorporateDebtandBorrowingArrangementsScheduleofCommittedCreditFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_82bf9aa9-2c3d-4c71-b26c-ac8d7dca4dd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_82bf9aa9-2c3d-4c71-b26c-ac8d7dca4dd5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_48bb5397-b9b5-41b0-afe8-62a627c2bac7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_82bf9aa9-2c3d-4c71-b26c-ac8d7dca4dd5" xlink:to="loc_us-gaap_CreditFacilityAxis_48bb5397-b9b5-41b0-afe8-62a627c2bac7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_48bb5397-b9b5-41b0-afe8-62a627c2bac7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_48bb5397-b9b5-41b0-afe8-62a627c2bac7" xlink:to="loc_us-gaap_CreditFacilityDomain_48bb5397-b9b5-41b0-afe8-62a627c2bac7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_fdb19066-d2bb-4f6f-baf1-d102be9e5e67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_48bb5397-b9b5-41b0-afe8-62a627c2bac7" xlink:to="loc_us-gaap_CreditFacilityDomain_fdb19066-d2bb-4f6f-baf1-d102be9e5e67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_eaa6371e-dd50-4890-b115-caf8b3490c6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_fdb19066-d2bb-4f6f-baf1-d102be9e5e67" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_eaa6371e-dd50-4890-b115-caf8b3490c6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_f95ecb08-b885-4586-87b3-f18ddb5970da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_82bf9aa9-2c3d-4c71-b26c-ac8d7dca4dd5" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_f95ecb08-b885-4586-87b3-f18ddb5970da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_f95ecb08-b885-4586-87b3-f18ddb5970da_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f95ecb08-b885-4586-87b3-f18ddb5970da" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_f95ecb08-b885-4586-87b3-f18ddb5970da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_b3fd096b-4c49-43f1-aa71-dad1aec67628" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f95ecb08-b885-4586-87b3-f18ddb5970da" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_b3fd096b-4c49-43f1-aa71-dad1aec67628" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_8d9b2651-f7e2-426f-a572-8b5924472363" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_b3fd096b-4c49-43f1-aa71-dad1aec67628" xlink:to="loc_us-gaap_LineOfCreditMember_8d9b2651-f7e2-426f-a572-8b5924472363" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_911be602-3c40-4ae0-b4a2-96437c0f5367" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_911be602-3c40-4ae0-b4a2-96437c0f5367" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_81a5ee97-42a9-4e5d-8cd1-e07c1413a5bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_LineOfCredit_81a5ee97-42a9-4e5d-8cd1-e07c1413a5bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_1f95ba45-6201-4f94-a9e8-fbb3f6ba553c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_1f95ba45-6201-4f94-a9e8-fbb3f6ba553c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_4a3d0a70-cf2d-4be2-8486-11b4ae21e798" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_4a3d0a70-cf2d-4be2-8486-11b4ae21e798" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_eaa393de-241d-4a03-b328-991e743d833d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration_eaa393de-241d-4a03-b328-991e743d833d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_79cac631-6337-4361-93ec-7cf3d4f0c492" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_31c6bcc3-d849-48c6-96a3-e3e911f3cd78" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_79cac631-6337-4361-93ec-7cf3d4f0c492" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofDebtUnderVehicleProgramsDetails" xlink:type="simple" xlink:href="car-20250630.xsd#DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofDebtUnderVehicleProgramsDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofDebtUnderVehicleProgramsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_4550e7e0-d12a-40af-9131-6be6362c6065" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_585338bc-e655-4db0-8c2f-29164d6071ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4550e7e0-d12a-40af-9131-6be6362c6065" xlink:to="loc_us-gaap_DebtInstrumentTable_585338bc-e655-4db0-8c2f-29164d6071ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_182fc049-2b10-47d3-8a53-a7b9b49a889d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_585338bc-e655-4db0-8c2f-29164d6071ac" xlink:to="loc_srt_CounterpartyNameAxis_182fc049-2b10-47d3-8a53-a7b9b49a889d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_182fc049-2b10-47d3-8a53-a7b9b49a889d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_182fc049-2b10-47d3-8a53-a7b9b49a889d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_182fc049-2b10-47d3-8a53-a7b9b49a889d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9178e289-faaf-439a-80f5-ce2f5a5cb99c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_182fc049-2b10-47d3-8a53-a7b9b49a889d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9178e289-faaf-439a-80f5-ce2f5a5cb99c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingMember_770907b1-5226-4b19-ab28-cfa251cbcf62" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9178e289-faaf-439a-80f5-ce2f5a5cb99c" xlink:to="loc_car_AvisBudgetRentalCarFundingMember_770907b1-5226-4b19-ab28-cfa251cbcf62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_c79ccee9-5d75-457f-bf7b-f0b2b431aed5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_585338bc-e655-4db0-8c2f-29164d6071ac" xlink:to="loc_us-gaap_DebtInstrumentAxis_c79ccee9-5d75-457f-bf7b-f0b2b431aed5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c79ccee9-5d75-457f-bf7b-f0b2b431aed5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_c79ccee9-5d75-457f-bf7b-f0b2b431aed5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c79ccee9-5d75-457f-bf7b-f0b2b431aed5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_c79ccee9-5d75-457f-bf7b-f0b2b431aed5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_DebtDueToRentalCarFundingMember_8c9c0d60-2669-4e40-871f-600fbc18a122" xlink:href="car-20250630.xsd#car_DebtDueToRentalCarFundingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:to="loc_car_DebtDueToRentalCarFundingMember_8c9c0d60-2669-4e40-871f-600fbc18a122" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_DebtDueToRentalCarFundingClassRNotesMember_79878710-704b-417e-a5b8-bbe24c4d3eb0" xlink:href="car-20250630.xsd#car_DebtDueToRentalCarFundingClassRNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_DebtDueToRentalCarFundingMember_8c9c0d60-2669-4e40-871f-600fbc18a122" xlink:to="loc_car_DebtDueToRentalCarFundingClassRNotesMember_79878710-704b-417e-a5b8-bbe24c4d3eb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AmericasDebtBorrowingsMember_f2b6f71a-6dde-425f-972d-964e2e6c948f" xlink:href="car-20250630.xsd#car_AmericasDebtBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:to="loc_car_AmericasDebtBorrowingsMember_f2b6f71a-6dde-425f-972d-964e2e6c948f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalDebtBorrowingsMember_cca2edbd-367d-4444-8eaf-50f25a457d01" xlink:href="car-20250630.xsd#car_InternationalDebtBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:to="loc_car_InternationalDebtBorrowingsMember_cca2edbd-367d-4444-8eaf-50f25a457d01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalCapitalLeasesMember_6c12ba5b-b019-4aea-81bf-e9e8ae70dc71" xlink:href="car-20250630.xsd#car_InternationalCapitalLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:to="loc_car_InternationalCapitalLeasesMember_6c12ba5b-b019-4aea-81bf-e9e8ae70dc71" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_OtherDebtUnderVehicleProgramMember_15057931-588f-46fe-bc9e-eacf724f4e8c" xlink:href="car-20250630.xsd#car_OtherDebtUnderVehicleProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:to="loc_car_OtherDebtUnderVehicleProgramMember_15057931-588f-46fe-bc9e-eacf724f4e8c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleProgramsMember_b702f9f8-b5a4-4ca6-b812-ced52c989a10" xlink:href="car-20250630.xsd#car_VehicleProgramsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6cdce5c6-14b3-4986-b92b-7cb4ce5f5be9" xlink:to="loc_car_VehicleProgramsMember_b702f9f8-b5a4-4ca6-b812-ced52c989a10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleProgramOutstandingDebt_33683a97-70cf-4e77-8fcb-beb8d739de09" xlink:href="car-20250630.xsd#car_VehicleProgramOutstandingDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4550e7e0-d12a-40af-9131-6be6362c6065" xlink:to="loc_car_VehicleProgramOutstandingDebt_33683a97-70cf-4e77-8fcb-beb8d739de09" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleProgramOutstandingDebtDeferredFinanceCostsNet_2d99345a-8cae-4fc9-b44a-e52c6b99a717" xlink:href="car-20250630.xsd#car_VehicleProgramOutstandingDebtDeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4550e7e0-d12a-40af-9131-6be6362c6065" xlink:to="loc_car_VehicleProgramOutstandingDebtDeferredFinanceCostsNet_2d99345a-8cae-4fc9-b44a-e52c6b99a717" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_49e90ac7-cdeb-46e8-a4af-fbbd63350df1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4550e7e0-d12a-40af-9131-6be6362c6065" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_49e90ac7-cdeb-46e8-a4af-fbbd63350df1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofDebtIssuedbyAESOPDetails" xlink:type="simple" xlink:href="car-20250630.xsd#DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofDebtIssuedbyAESOPDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofDebtIssuedbyAESOPDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_6029956a-ab59-40a0-9a41-4f8d5eb92c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_218aef59-59b1-42a7-a04c-8c9bb36a28a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6029956a-ab59-40a0-9a41-4f8d5eb92c2c" xlink:to="loc_us-gaap_DebtInstrumentTable_218aef59-59b1-42a7-a04c-8c9bb36a28a2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_91b78371-0242-42bf-a5f6-dfe45869dae1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_218aef59-59b1-42a7-a04c-8c9bb36a28a2" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_91b78371-0242-42bf-a5f6-dfe45869dae1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_91b78371-0242-42bf-a5f6-dfe45869dae1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_91b78371-0242-42bf-a5f6-dfe45869dae1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_91b78371-0242-42bf-a5f6-dfe45869dae1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_91b78371-0242-42bf-a5f6-dfe45869dae1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramAugust2027Member_85a5c90e-9380-41d3-8ba9-c62f68a7a5c2" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramAugust2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramAugust2027Member_85a5c90e-9380-41d3-8ba9-c62f68a7a5c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramApril2028Member_1369110e-9842-422a-9742-17c8b516fca6" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramApril2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramApril2028Member_1369110e-9842-422a-9742-17c8b516fca6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramJune2028Member_6f5d91d0-b982-46ab-87bd-bb88393b1041" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramJune2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramJune2028Member_6f5d91d0-b982-46ab-87bd-bb88393b1041" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramDecember2028Member_83af436c-bbad-41e7-a369-bb96526d4aae" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramDecember2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramDecember2028Member_83af436c-bbad-41e7-a369-bb96526d4aae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramFebruary2029Member_5407d0fe-382c-4979-b14d-ae2b5281e0b2" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramFebruary2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramFebruary2029Member_5407d0fe-382c-4979-b14d-ae2b5281e0b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramAugust2028Member_5ccfba25-deda-41bb-a4fe-623f916cfe33" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramAugust2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramAugust2028Member_5ccfba25-deda-41bb-a4fe-623f916cfe33" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingProgramAugust2030Member_9776bde2-d958-4d37-a5d8-9f6e75d7d096" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingProgramAugust2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ef27f3c9-145c-40aa-8d00-a971db1b27d1" xlink:to="loc_car_AvisBudgetRentalCarFundingProgramAugust2030Member_9776bde2-d958-4d37-a5d8-9f6e75d7d096" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_d9d626c0-2b8b-4d5f-82fa-70ca9f229802" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6029956a-ab59-40a0-9a41-4f8d5eb92c2c" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_d9d626c0-2b8b-4d5f-82fa-70ca9f229802" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesAtCarryingValue_a04c1155-4a87-4db5-98a7-56c326918d8f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6029956a-ab59-40a0-9a41-4f8d5eb92c2c" xlink:to="loc_us-gaap_AssetBackedSecuritiesAtCarryingValue_a04c1155-4a87-4db5-98a7-56c326918d8f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsNarrativeDetails" xlink:type="simple" xlink:href="car-20250630.xsd#DebtUnderVehicleProgramsandBorrowingArrangementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_790fed23-1725-4e67-a6cd-463912565296" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_45dfa592-dba9-46e4-a488-bfd641086d2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_790fed23-1725-4e67-a6cd-463912565296" xlink:to="loc_us-gaap_DebtInstrumentTable_45dfa592-dba9-46e4-a488-bfd641086d2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_7666e9ba-a0ae-4b2b-8ca4-7dfcee085c84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_45dfa592-dba9-46e4-a488-bfd641086d2f" xlink:to="loc_us-gaap_DebtInstrumentAxis_7666e9ba-a0ae-4b2b-8ca4-7dfcee085c84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7666e9ba-a0ae-4b2b-8ca4-7dfcee085c84_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7666e9ba-a0ae-4b2b-8ca4-7dfcee085c84" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7666e9ba-a0ae-4b2b-8ca4-7dfcee085c84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_cab5e5ef-09ae-437a-950c-1b5263ded261" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7666e9ba-a0ae-4b2b-8ca4-7dfcee085c84" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_cab5e5ef-09ae-437a-950c-1b5263ded261" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_RepurchaseFacilityMember_b112aac5-80e2-4bc3-83b2-ca6e680fc6ef" xlink:href="car-20250630.xsd#car_RepurchaseFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_cab5e5ef-09ae-437a-950c-1b5263ded261" xlink:to="loc_car_RepurchaseFacilityMember_b112aac5-80e2-4bc3-83b2-ca6e680fc6ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_DebtInterestTenorPeriod_74321682-915d-404a-9f08-2692104dfab6" xlink:href="car-20250630.xsd#car_DebtInterestTenorPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_790fed23-1725-4e67-a6cd-463912565296" xlink:to="loc_car_DebtInterestTenorPeriod_74321682-915d-404a-9f08-2692104dfab6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleProgramOutstandingDebt_437a99aa-ebf5-4c7e-a65f-52460036e348" xlink:href="car-20250630.xsd#car_VehicleProgramOutstandingDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_790fed23-1725-4e67-a6cd-463912565296" xlink:to="loc_car_VehicleProgramOutstandingDebt_437a99aa-ebf5-4c7e-a65f-52460036e348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_3f270885-77fd-47c0-b69c-e34cf27e983e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_790fed23-1725-4e67-a6cd-463912565296" xlink:to="loc_us-gaap_DebtInstrumentInterestRateDuringPeriod_3f270885-77fd-47c0-b69c-e34cf27e983e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount_c230ac95-c6d6-440c-bdd2-50da89cd3384" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCollateralAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_790fed23-1725-4e67-a6cd-463912565296" xlink:to="loc_us-gaap_DebtInstrumentCollateralAmount_c230ac95-c6d6-440c-bdd2-50da89cd3384" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofContractualMaturitiesDetails" xlink:type="simple" xlink:href="car-20250630.xsd#DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofContractualMaturitiesDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofContractualMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_dde3b61d-db4a-49de-97ac-b0c27cbd9929" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_DebtInstrumentTable_dde3b61d-db4a-49de-97ac-b0c27cbd9929" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_41c933d1-0fc5-4535-a966-c296cd8d5af9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dde3b61d-db4a-49de-97ac-b0c27cbd9929" xlink:to="loc_us-gaap_DebtInstrumentAxis_41c933d1-0fc5-4535-a966-c296cd8d5af9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_41c933d1-0fc5-4535-a966-c296cd8d5af9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_41c933d1-0fc5-4535-a966-c296cd8d5af9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_41c933d1-0fc5-4535-a966-c296cd8d5af9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_94806a7b-a299-4ec4-93bb-a42f215fc51f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_41c933d1-0fc5-4535-a966-c296cd8d5af9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_94806a7b-a299-4ec4-93bb-a42f215fc51f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleProgramsMember_7ec17691-d1b2-46e2-a67f-bc7cbb1bb9e6" xlink:href="car-20250630.xsd#car_VehicleProgramsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_94806a7b-a299-4ec4-93bb-a42f215fc51f" xlink:to="loc_car_VehicleProgramsMember_7ec17691-d1b2-46e2-a67f-bc7cbb1bb9e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_f34d89ed-6889-4f8b-b71f-0eaed8ac2ae1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_dde3b61d-db4a-49de-97ac-b0c27cbd9929" xlink:to="loc_us-gaap_CreditFacilityAxis_f34d89ed-6889-4f8b-b71f-0eaed8ac2ae1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_f34d89ed-6889-4f8b-b71f-0eaed8ac2ae1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_f34d89ed-6889-4f8b-b71f-0eaed8ac2ae1" xlink:to="loc_us-gaap_CreditFacilityDomain_f34d89ed-6889-4f8b-b71f-0eaed8ac2ae1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_554f48ce-31ef-4b81-a0c7-d7f0afb03a62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_f34d89ed-6889-4f8b-b71f-0eaed8ac2ae1" xlink:to="loc_us-gaap_CreditFacilityDomain_554f48ce-31ef-4b81-a0c7-d7f0afb03a62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_BankAndBankSponsoredFacilitiesMember_39309c4d-fd99-4931-8e33-d69eb2d4afea" xlink:href="car-20250630.xsd#car_BankAndBankSponsoredFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_554f48ce-31ef-4b81-a0c7-d7f0afb03a62" xlink:to="loc_car_BankAndBankSponsoredFacilitiesMember_39309c4d-fd99-4931-8e33-d69eb2d4afea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_02e31116-ed52-40ac-89df-5f8662323ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_02e31116-ed52-40ac-89df-5f8662323ab0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_98340e0c-bc4d-46cb-8925-c4e7ab59e0d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_98340e0c-bc4d-46cb-8925-c4e7ab59e0d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_d98f5aa4-16f2-4b08-914a-e70cd8ee3e4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_d98f5aa4-16f2-4b08-914a-e70cd8ee3e4b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_194853c8-9aa8-4d90-9a00-211fd5415f16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_194853c8-9aa8-4d90-9a00-211fd5415f16" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_ca8064fa-25d3-47f7-b7b6-a1534e4afa92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_ca8064fa-25d3-47f7-b7b6-a1534e4afa92" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_LongTermDebtMaturityAfterYearFour_c6f1ca91-8eff-4852-8845-76e73824a84c" xlink:href="car-20250630.xsd#car_LongTermDebtMaturityAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_car_LongTermDebtMaturityAfterYearFour_c6f1ca91-8eff-4852-8845-76e73824a84c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_2849501a-086d-4200-9cd6-40b6bf415896" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_LongTermDebt_2849501a-086d-4200-9cd6-40b6bf415896" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtWeightedAverageInterestRate_e7bddb71-02bc-4b0f-8b9d-61fb30fabbb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e74d7c21-9551-4c30-8716-60916a24d256" xlink:to="loc_us-gaap_ShortTermDebtWeightedAverageInterestRate_e7bddb71-02bc-4b0f-8b9d-61fb30fabbb4" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofAvailableFundingUndertheVehicleProgramsDetails" xlink:type="simple" xlink:href="car-20250630.xsd#DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofAvailableFundingUndertheVehicleProgramsDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/DebtUnderVehicleProgramsandBorrowingArrangementsScheduleofAvailableFundingUndertheVehicleProgramsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_b7fab5ab-9d5d-48f0-8f78-c213b351e6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_23a3377f-9ce1-469b-99fb-6731a3175a2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b7fab5ab-9d5d-48f0-8f78-c213b351e6ab" xlink:to="loc_us-gaap_DebtInstrumentTable_23a3377f-9ce1-469b-99fb-6731a3175a2d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_7285fb48-4298-45fe-88ba-60b7dc32d31f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_23a3377f-9ce1-469b-99fb-6731a3175a2d" xlink:to="loc_us-gaap_DebtInstrumentAxis_7285fb48-4298-45fe-88ba-60b7dc32d31f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7285fb48-4298-45fe-88ba-60b7dc32d31f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7285fb48-4298-45fe-88ba-60b7dc32d31f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7285fb48-4298-45fe-88ba-60b7dc32d31f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_42abec84-5a27-434f-84f9-884f293b1cb5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7285fb48-4298-45fe-88ba-60b7dc32d31f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_42abec84-5a27-434f-84f9-884f293b1cb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_DebtDueToRentalCarFundingMember_3c22b79b-d920-46b3-a764-9cc07e3d6b8e" xlink:href="car-20250630.xsd#car_DebtDueToRentalCarFundingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_42abec84-5a27-434f-84f9-884f293b1cb5" xlink:to="loc_car_DebtDueToRentalCarFundingMember_3c22b79b-d920-46b3-a764-9cc07e3d6b8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AmericasDebtBorrowingsMember_d78d3eb0-7965-4faa-af0d-577a99bfbe9e" xlink:href="car-20250630.xsd#car_AmericasDebtBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_42abec84-5a27-434f-84f9-884f293b1cb5" xlink:to="loc_car_AmericasDebtBorrowingsMember_d78d3eb0-7965-4faa-af0d-577a99bfbe9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalDebtBorrowingsMember_87a39e5d-a517-4123-9093-67a0afe399b0" xlink:href="car-20250630.xsd#car_InternationalDebtBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_42abec84-5a27-434f-84f9-884f293b1cb5" xlink:to="loc_car_InternationalDebtBorrowingsMember_87a39e5d-a517-4123-9093-67a0afe399b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalCapitalLeasesMember_9ffcf60b-5dfa-4bfa-9177-eb112e584802" xlink:href="car-20250630.xsd#car_InternationalCapitalLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_42abec84-5a27-434f-84f9-884f293b1cb5" xlink:to="loc_car_InternationalCapitalLeasesMember_9ffcf60b-5dfa-4bfa-9177-eb112e584802" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f7b3fad9-c273-401b-8b5a-1471056140f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_23a3377f-9ce1-469b-99fb-6731a3175a2d" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f7b3fad9-c273-401b-8b5a-1471056140f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f7b3fad9-c273-401b-8b5a-1471056140f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f7b3fad9-c273-401b-8b5a-1471056140f5" xlink:to="loc_us-gaap_RelatedPartyDomain_f7b3fad9-c273-401b-8b5a-1471056140f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_0cc5fa27-80cd-4698-9f1c-5622d7a1a7f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f7b3fad9-c273-401b-8b5a-1471056140f5" xlink:to="loc_us-gaap_RelatedPartyDomain_0cc5fa27-80cd-4698-9f1c-5622d7a1a7f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_ee14b069-2880-4563-8912-c76d7f68dc95" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_0cc5fa27-80cd-4698-9f1c-5622d7a1a7f1" xlink:to="loc_srt_AffiliatedEntityMember_ee14b069-2880-4563-8912-c76d7f68dc95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_a93a19db-b29a-4ec8-ac1c-18d8ff5b5c52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_23a3377f-9ce1-469b-99fb-6731a3175a2d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_a93a19db-b29a-4ec8-ac1c-18d8ff5b5c52" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a93a19db-b29a-4ec8-ac1c-18d8ff5b5c52_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_a93a19db-b29a-4ec8-ac1c-18d8ff5b5c52" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a93a19db-b29a-4ec8-ac1c-18d8ff5b5c52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_276a1066-9866-497e-ab1c-e19aa5fdb296" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_a93a19db-b29a-4ec8-ac1c-18d8ff5b5c52" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_276a1066-9866-497e-ab1c-e19aa5fdb296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_d03b0703-7c90-4277-ab49-27191c0f119d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_276a1066-9866-497e-ab1c-e19aa5fdb296" xlink:to="loc_us-gaap_SecuredDebtMember_d03b0703-7c90-4277-ab49-27191c0f119d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e9fefc1e-1d2f-4018-9a90-03fed8abd92a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b7fab5ab-9d5d-48f0-8f78-c213b351e6ab" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e9fefc1e-1d2f-4018-9a90-03fed8abd92a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_7232e960-f699-4817-843b-f8f3c5a29430" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b7fab5ab-9d5d-48f0-8f78-c213b351e6ab" xlink:to="loc_us-gaap_LineOfCredit_7232e960-f699-4817-843b-f8f3c5a29430" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_be20b2b4-5c30-4b75-b4ae-8af707ca8d90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b7fab5ab-9d5d-48f0-8f78-c213b351e6ab" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_be20b2b4-5c30-4b75-b4ae-8af707ca8d90" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="car-20250630.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_cdb55038-7c06-4590-bd2b-32863c72c708" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:to="loc_us-gaap_LossContingenciesTable_cdb55038-7c06-4590-bd2b-32863c72c708" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainContingenciesByNatureAxis_c46a555e-fddf-46fc-ae69-fd3130678132" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainContingenciesByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_cdb55038-7c06-4590-bd2b-32863c72c708" xlink:to="loc_us-gaap_GainContingenciesByNatureAxis_c46a555e-fddf-46fc-ae69-fd3130678132" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainContingencyNatureDomain_c46a555e-fddf-46fc-ae69-fd3130678132_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GainContingenciesByNatureAxis_c46a555e-fddf-46fc-ae69-fd3130678132" xlink:to="loc_us-gaap_GainContingencyNatureDomain_c46a555e-fddf-46fc-ae69-fd3130678132_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainContingencyNatureDomain_e452d215-1702-4e35-b60e-5676d90e2028" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GainContingenciesByNatureAxis_c46a555e-fddf-46fc-ae69-fd3130678132" xlink:to="loc_us-gaap_GainContingencyNatureDomain_e452d215-1702-4e35-b60e-5676d90e2028" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_TaxLiabilityMember_7897d50b-a544-44b9-bf0a-37e5d545ef51" xlink:href="car-20250630.xsd#car_TaxLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GainContingencyNatureDomain_e452d215-1702-4e35-b60e-5676d90e2028" xlink:to="loc_car_TaxLiabilityMember_7897d50b-a544-44b9-bf0a-37e5d545ef51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_b8eb1652-ea07-4184-b6c8-6eef7abfee71" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_cdb55038-7c06-4590-bd2b-32863c72c708" xlink:to="loc_dei_LegalEntityAxis_b8eb1652-ea07-4184-b6c8-6eef7abfee71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b8eb1652-ea07-4184-b6c8-6eef7abfee71_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_b8eb1652-ea07-4184-b6c8-6eef7abfee71" xlink:to="loc_dei_EntityDomain_b8eb1652-ea07-4184-b6c8-6eef7abfee71_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e662334e-dbac-46a4-b743-e52aff8e8f0c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_b8eb1652-ea07-4184-b6c8-6eef7abfee71" xlink:to="loc_dei_EntityDomain_e662334e-dbac-46a4-b743-e52aff8e8f0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_RealEstateIncMember_65c7ea8e-0aac-4ad5-b1f7-eac206cb46ff" xlink:href="car-20250630.xsd#car_RealEstateIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e662334e-dbac-46a4-b743-e52aff8e8f0c" xlink:to="loc_car_RealEstateIncMember_65c7ea8e-0aac-4ad5-b1f7-eac206cb46ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_WyndhamHotelsAndResortsIncAndTravelLeisureCoMember_0e7ba280-ed79-46f5-9224-4244ea9e2cb3" xlink:href="car-20250630.xsd#car_WyndhamHotelsAndResortsIncAndTravelLeisureCoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e662334e-dbac-46a4-b743-e52aff8e8f0c" xlink:to="loc_car_WyndhamHotelsAndResortsIncAndTravelLeisureCoMember_0e7ba280-ed79-46f5-9224-4244ea9e2cb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_LossContingencyLiabilityAssumedPercent_d855856e-551a-435f-bb38-daf9fb2c8148" xlink:href="car-20250630.xsd#car_LossContingencyLiabilityAssumedPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:to="loc_car_LossContingencyLiabilityAssumedPercent_d855856e-551a-435f-bb38-daf9fb2c8148" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued_9cf440ea-a8d1-4c6c-bacb-9774c8bdcf6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:to="loc_us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued_9cf440ea-a8d1-4c6c-bacb-9774c8bdcf6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear_a7c41bcf-a41b-428b-b50e-1d3ffb6c0b57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear_a7c41bcf-a41b-428b-b50e-1d3ffb6c0b57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermPurchaseCommitmentPeriod_d87eef68-5828-4e4b-b197-702433da65ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermPurchaseCommitmentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:to="loc_us-gaap_LongtermPurchaseCommitmentPeriod_d87eef68-5828-4e4b-b197-702433da65ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_LongTermPurchaseCommitmentPeriodIncreaseDecrease_3ed0d2c3-727c-4b84-8ca6-1ccd54796d05" xlink:href="car-20250630.xsd#car_LongTermPurchaseCommitmentPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22e69365-fce5-43e9-a4d6-37346ca223d3" xlink:to="loc_car_LongTermPurchaseCommitmentPeriodIncreaseDecrease_3ed0d2c3-727c-4b84-8ca6-1ccd54796d05" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/StockholdersEquityScheduleofAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="car-20250630.xsd#StockholdersEquityScheduleofAccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/StockholdersEquityScheduleofAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_7a0403e5-5fa4-4a27-9c83-333a5f7f5f99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a5c1c4a0-796d-4dcd-9c10-fce3297924c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_7a0403e5-5fa4-4a27-9c83-333a5f7f5f99" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a5c1c4a0-796d-4dcd-9c10-fce3297924c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_80ef728a-3e7f-4e7a-8f61-a6a45d56be2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a5c1c4a0-796d-4dcd-9c10-fce3297924c6" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_80ef728a-3e7f-4e7a-8f61-a6a45d56be2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_80ef728a-3e7f-4e7a-8f61-a6a45d56be2d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_80ef728a-3e7f-4e7a-8f61-a6a45d56be2d" xlink:to="loc_us-gaap_EquityComponentDomain_80ef728a-3e7f-4e7a-8f61-a6a45d56be2d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_091c8855-b210-4e59-b4bf-3a1edc5af8b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_80ef728a-3e7f-4e7a-8f61-a6a45d56be2d" xlink:to="loc_us-gaap_EquityComponentDomain_091c8855-b210-4e59-b4bf-3a1edc5af8b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3e6493c9-61b0-4091-af16-22a79808bead" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_091c8855-b210-4e59-b4bf-3a1edc5af8b8" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3e6493c9-61b0-4091-af16-22a79808bead" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_aa918419-ee1a-4683-8511-627339874c30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3e6493c9-61b0-4091-af16-22a79808bead" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_aa918419-ee1a-4683-8511-627339874c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_2a277d4c-51d7-4353-80ff-253856f2e392" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3e6493c9-61b0-4091-af16-22a79808bead" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_2a277d4c-51d7-4353-80ff-253856f2e392" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_6688b5e1-f56d-4084-8a8e-4a598019ef76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_3e6493c9-61b0-4091-af16-22a79808bead" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_6688b5e1-f56d-4084-8a8e-4a598019ef76" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_c79cfdc8-513e-414c-a64e-9870916a65a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a5c1c4a0-796d-4dcd-9c10-fce3297924c6" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_c79cfdc8-513e-414c-a64e-9870916a65a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_c79cfdc8-513e-414c-a64e-9870916a65a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_c79cfdc8-513e-414c-a64e-9870916a65a0" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_c79cfdc8-513e-414c-a64e-9870916a65a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_be3216d8-42bb-40c7-826c-0113f10bae69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_c79cfdc8-513e-414c-a64e-9870916a65a0" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_be3216d8-42bb-40c7-826c-0113f10bae69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_6d482efe-c3df-4f6d-bae1-9bd4c7062b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_be3216d8-42bb-40c7-826c-0113f10bae69" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_6d482efe-c3df-4f6d-bae1-9bd4c7062b7f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_e6a6acc3-d7e1-46c7-b410-fa91826925e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a5c1c4a0-796d-4dcd-9c10-fce3297924c6" xlink:to="loc_us-gaap_HedgingDesignationAxis_e6a6acc3-d7e1-46c7-b410-fa91826925e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_e6a6acc3-d7e1-46c7-b410-fa91826925e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_e6a6acc3-d7e1-46c7-b410-fa91826925e7" xlink:to="loc_us-gaap_HedgingDesignationDomain_e6a6acc3-d7e1-46c7-b410-fa91826925e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_c59d7ee4-79fe-4d46-aac1-943da6bb246d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_e6a6acc3-d7e1-46c7-b410-fa91826925e7" xlink:to="loc_us-gaap_HedgingDesignationDomain_c59d7ee4-79fe-4d46-aac1-943da6bb246d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_dd1fcf83-cbf4-4a75-8cca-ccdf1313f781" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_c59d7ee4-79fe-4d46-aac1-943da6bb246d" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_dd1fcf83-cbf4-4a75-8cca-ccdf1313f781" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_7a0403e5-5fa4-4a27-9c83-333a5f7f5f99" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2ccf1403-9354-46cc-9a4e-0891b0210460" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2ccf1403-9354-46cc-9a4e-0891b0210460" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_977ade1f-cc24-43fa-9bde-506534e2b1f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_977ade1f-cc24-43fa-9bde-506534e2b1f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_271b336d-7400-4e96-924b-9304f1e06201" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_271b336d-7400-4e96-924b-9304f1e06201" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_20f0785f-a7f8-404b-96f2-181142f8c48d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_20f0785f-a7f8-404b-96f2-181142f8c48d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_d433f239-c9a1-4ee4-8032-73ef08a78758" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_d433f239-c9a1-4ee4-8032-73ef08a78758" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_667627f0-05d1-413f-bf86-0cb15c0790c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_74c356d6-8d70-48b2-bcd5-5c9d0fc64e15" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_667627f0-05d1-413f-bf86-0cb15c0790c5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_ba31d774-e491-422d-9f8a-316bca6c3e32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TranslationAdjustmentForNetInvestmentHedgeNetOfTax_75965801-223f-41db-8d31-cf2ce7c83e33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TranslationAdjustmentForNetInvestmentHedgeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_7a0403e5-5fa4-4a27-9c83-333a5f7f5f99" xlink:to="loc_us-gaap_TranslationAdjustmentForNetInvestmentHedgeNetOfTax_75965801-223f-41db-8d31-cf2ce7c83e33" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="simple" xlink:href="car-20250630.xsd#RelatedPartyTransactionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_3447c052-66d9-487a-b82e-ea758006824a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_5f0b5325-863f-4648-a5ca-2a7d8dafdbdc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3447c052-66d9-487a-b82e-ea758006824a" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_5f0b5325-863f-4648-a5ca-2a7d8dafdbdc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_76de03c3-9a61-41ac-9544-8cc50dea74f8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_5f0b5325-863f-4648-a5ca-2a7d8dafdbdc" xlink:to="loc_srt_OwnershipAxis_76de03c3-9a61-41ac-9544-8cc50dea74f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_76de03c3-9a61-41ac-9544-8cc50dea74f8_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_76de03c3-9a61-41ac-9544-8cc50dea74f8" xlink:to="loc_srt_OwnershipDomain_76de03c3-9a61-41ac-9544-8cc50dea74f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_209250eb-752c-4135-80c8-896c8175e50c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_76de03c3-9a61-41ac-9544-8cc50dea74f8" xlink:to="loc_srt_OwnershipDomain_209250eb-752c-4135-80c8-896c8175e50c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SubsidiaryEquityMember_2b7c0e58-5e48-49b8-9e54-c88162a18e9a" xlink:href="car-20250630.xsd#car_SubsidiaryEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_209250eb-752c-4135-80c8-896c8175e50c" xlink:to="loc_car_SubsidiaryEquityMember_2b7c0e58-5e48-49b8-9e54-c88162a18e9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_3d98687b-689c-407d-94f0-e5fbbc2ba28a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_5f0b5325-863f-4648-a5ca-2a7d8dafdbdc" xlink:to="loc_dei_LegalEntityAxis_3d98687b-689c-407d-94f0-e5fbbc2ba28a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3d98687b-689c-407d-94f0-e5fbbc2ba28a_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3d98687b-689c-407d-94f0-e5fbbc2ba28a" xlink:to="loc_dei_EntityDomain_3d98687b-689c-407d-94f0-e5fbbc2ba28a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a29bd2ce-5f0e-4941-99eb-075c3a6669bb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3d98687b-689c-407d-94f0-e5fbbc2ba28a" xlink:to="loc_dei_EntityDomain_a29bd2ce-5f0e-4941-99eb-075c3a6669bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SRSMobilityVenturesLLCMember_276fbe98-6af0-4b2b-9b5e-8f61892c77ed" xlink:href="car-20250630.xsd#car_SRSMobilityVenturesLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a29bd2ce-5f0e-4941-99eb-075c3a6669bb" xlink:to="loc_car_SRSMobilityVenturesLLCMember_276fbe98-6af0-4b2b-9b5e-8f61892c77ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_4e690591-db56-47e1-bd01-c0d08d8bded1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_5f0b5325-863f-4648-a5ca-2a7d8dafdbdc" xlink:to="loc_srt_RangeAxis_4e690591-db56-47e1-bd01-c0d08d8bded1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4e690591-db56-47e1-bd01-c0d08d8bded1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4e690591-db56-47e1-bd01-c0d08d8bded1" xlink:to="loc_srt_RangeMember_4e690591-db56-47e1-bd01-c0d08d8bded1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_008c9e46-abc4-47a0-9743-fb82bd1e3d2e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4e690591-db56-47e1-bd01-c0d08d8bded1" xlink:to="loc_srt_RangeMember_008c9e46-abc4-47a0-9743-fb82bd1e3d2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_9b062c08-f050-4d7d-b221-e9c88e7772f5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_008c9e46-abc4-47a0-9743-fb82bd1e3d2e" xlink:to="loc_srt_MaximumMember_9b062c08-f050-4d7d-b221-e9c88e7772f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ff53b1cd-784d-4bdd-b4c6-8f3b73dd40c1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_5f0b5325-863f-4648-a5ca-2a7d8dafdbdc" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ff53b1cd-784d-4bdd-b4c6-8f3b73dd40c1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_ff53b1cd-784d-4bdd-b4c6-8f3b73dd40c1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ff53b1cd-784d-4bdd-b4c6-8f3b73dd40c1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_ff53b1cd-784d-4bdd-b4c6-8f3b73dd40c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_3084410b-a41f-4f69-8111-bc6a10adab34" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ff53b1cd-784d-4bdd-b4c6-8f3b73dd40c1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_3084410b-a41f-4f69-8111-bc6a10adab34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_CompanySubsidiaryMember_57530a2e-f351-418c-ba1a-dd9686e746cb" xlink:href="car-20250630.xsd#car_CompanySubsidiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_3084410b-a41f-4f69-8111-bc6a10adab34" xlink:to="loc_car_CompanySubsidiaryMember_57530a2e-f351-418c-ba1a-dd9686e746cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_41673c10-6771-48d3-8b01-cc48236d0fa9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3447c052-66d9-487a-b82e-ea758006824a" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_41673c10-6771-48d3-8b01-cc48236d0fa9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_88462507-be29-4173-ad49-f70120ca8916" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_3447c052-66d9-487a-b82e-ea758006824a" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_88462507-be29-4173-ad49-f70120ca8916" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/RelatedPartyTransactionsScheduleofEquityMethodInvestmentinBalanceSheetandStatementsofComprehensiveIncomeExpenseDetails" xlink:type="simple" xlink:href="car-20250630.xsd#RelatedPartyTransactionsScheduleofEquityMethodInvestmentinBalanceSheetandStatementsofComprehensiveIncomeExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/RelatedPartyTransactionsScheduleofEquityMethodInvestmentinBalanceSheetandStatementsofComprehensiveIncomeExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_13b2f9db-1345-4bcb-b097-22b580edf291" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2d2dde9-c57c-483f-915a-929357657af4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_13b2f9db-1345-4bcb-b097-22b580edf291" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2d2dde9-c57c-483f-915a-929357657af4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_52020cde-390a-41d9-939c-fec7c4ff0790" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2d2dde9-c57c-483f-915a-929357657af4" xlink:to="loc_srt_CounterpartyNameAxis_52020cde-390a-41d9-939c-fec7c4ff0790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_52020cde-390a-41d9-939c-fec7c4ff0790_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_52020cde-390a-41d9-939c-fec7c4ff0790" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_52020cde-390a-41d9-939c-fec7c4ff0790_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_cf35ab0b-9078-44c9-bafb-b47433995c49" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_52020cde-390a-41d9-939c-fec7c4ff0790" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_cf35ab0b-9078-44c9-bafb-b47433995c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisMobilityVenturesLLCAMVMember_0f37e9cd-6a12-4aee-9d98-68979792a9b4" xlink:href="car-20250630.xsd#car_AvisMobilityVenturesLLCAMVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_cf35ab0b-9078-44c9-bafb-b47433995c49" xlink:to="loc_car_AvisMobilityVenturesLLCAMVMember_0f37e9cd-6a12-4aee-9d98-68979792a9b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_b92bfaf5-6853-4dff-b134-430d844b0b94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2d2dde9-c57c-483f-915a-929357657af4" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_b92bfaf5-6853-4dff-b134-430d844b0b94" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_b92bfaf5-6853-4dff-b134-430d844b0b94_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_b92bfaf5-6853-4dff-b134-430d844b0b94" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_b92bfaf5-6853-4dff-b134-430d844b0b94_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_46b2b660-4412-4a90-9e6e-b63dac1808c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_b92bfaf5-6853-4dff-b134-430d844b0b94" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_46b2b660-4412-4a90-9e6e-b63dac1808c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AdministrativeServicesMember_c8fc04af-bde1-4f8c-ba7a-7e2e6c66c587" xlink:href="car-20250630.xsd#car_AdministrativeServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_46b2b660-4412-4a90-9e6e-b63dac1808c6" xlink:to="loc_car_AdministrativeServicesMember_c8fc04af-bde1-4f8c-ba7a-7e2e6c66c587" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EquipmentInvestmentMember_41ce9b42-081e-48ed-bae5-e178953b2133" xlink:href="car-20250630.xsd#car_EquipmentInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_46b2b660-4412-4a90-9e6e-b63dac1808c6" xlink:to="loc_car_EquipmentInvestmentMember_41ce9b42-081e-48ed-bae5-e178953b2133" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_ReceivablesFromRelatedPartyMember_942ed432-84c8-4d5c-bd51-b975df6c9e28" xlink:href="car-20250630.xsd#car_ReceivablesFromRelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_46b2b660-4412-4a90-9e6e-b63dac1808c6" xlink:to="loc_car_ReceivablesFromRelatedPartyMember_942ed432-84c8-4d5c-bd51-b975df6c9e28" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_038f28c7-c372-4726-b151-4a08c74216aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2d2dde9-c57c-483f-915a-929357657af4" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_038f28c7-c372-4726-b151-4a08c74216aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_038f28c7-c372-4726-b151-4a08c74216aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_038f28c7-c372-4726-b151-4a08c74216aa" xlink:to="loc_us-gaap_RelatedPartyDomain_038f28c7-c372-4726-b151-4a08c74216aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_25869525-7331-4b4c-a615-ac2293f2a6cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_038f28c7-c372-4726-b151-4a08c74216aa" xlink:to="loc_us-gaap_RelatedPartyDomain_25869525-7331-4b4c-a615-ac2293f2a6cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_d0e6d0f9-5d1e-45e6-b985-1a6913f3d072" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_25869525-7331-4b4c-a615-ac2293f2a6cf" xlink:to="loc_us-gaap_RelatedPartyMember_d0e6d0f9-5d1e-45e6-b985-1a6913f3d072" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_da0033d4-9eb7-40e6-b867-83140fd673c0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2d2dde9-c57c-483f-915a-929357657af4" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_da0033d4-9eb7-40e6-b867-83140fd673c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_da0033d4-9eb7-40e6-b867-83140fd673c0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_da0033d4-9eb7-40e6-b867-83140fd673c0" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_da0033d4-9eb7-40e6-b867-83140fd673c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_d99603f1-554e-4fa6-b0c2-e8b09257c4ad" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_da0033d4-9eb7-40e6-b867-83140fd673c0" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_d99603f1-554e-4fa6-b0c2-e8b09257c4ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisMobilityVenturesLLCAMVMember_906c11d7-a2ff-4bd7-9ae7-6b8c297efafb" xlink:href="car-20250630.xsd#car_AvisMobilityVenturesLLCAMVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_d99603f1-554e-4fa6-b0c2-e8b09257c4ad" xlink:to="loc_car_AvisMobilityVenturesLLCAMVMember_906c11d7-a2ff-4bd7-9ae7-6b8c297efafb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_e4e2c9da-1f52-42ad-aed9-37be03335cf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_13b2f9db-1345-4bcb-b097-22b580edf291" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_e4e2c9da-1f52-42ad-aed9-37be03335cf5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehiclesNet_832c5d71-19c9-4241-a1b5-4b3cd1fc024d" xlink:href="car-20250630.xsd#car_VehiclesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_13b2f9db-1345-4bcb-b097-22b580edf291" xlink:to="loc_car_VehiclesNet_832c5d71-19c9-4241-a1b5-4b3cd1fc024d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_a4bedf65-342f-48e2-bbde-a4960edcc7d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_13b2f9db-1345-4bcb-b097-22b580edf291" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_a4bedf65-342f-48e2-bbde-a4960edcc7d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleNetInvestmentInLeaseReceivables_7909f225-b7bc-4de5-a3ce-a40f36c22bb7" xlink:href="car-20250630.xsd#car_VehicleNetInvestmentInLeaseReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_13b2f9db-1345-4bcb-b097-22b580edf291" xlink:to="loc_car_VehicleNetInvestmentInLeaseReceivables_7909f225-b7bc-4de5-a3ce-a40f36c22bb7" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/StockBasedCompensationScheduleofStockBasedCompensationActivityDetails" xlink:type="simple" xlink:href="car-20250630.xsd#StockBasedCompensationScheduleofStockBasedCompensationActivityDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/StockBasedCompensationScheduleofStockBasedCompensationActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c57d1ad9-7411-456a-8aa9-34f1757e12de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c57d1ad9-7411-456a-8aa9-34f1757e12de" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8b2e3358-28a0-4f3f-ae37-b97826604c9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c57d1ad9-7411-456a-8aa9-34f1757e12de" xlink:to="loc_us-gaap_AwardTypeAxis_8b2e3358-28a0-4f3f-ae37-b97826604c9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b2e3358-28a0-4f3f-ae37-b97826604c9d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8b2e3358-28a0-4f3f-ae37-b97826604c9d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8b2e3358-28a0-4f3f-ae37-b97826604c9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d31eaf1a-3aa4-4f26-95b2-678cc1feb94f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8b2e3358-28a0-4f3f-ae37-b97826604c9d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d31eaf1a-3aa4-4f26-95b2-678cc1feb94f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_5a6257e5-967c-4bee-bde6-5b281ca8917a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d31eaf1a-3aa4-4f26-95b2-678cc1feb94f" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_5a6257e5-967c-4bee-bde6-5b281ca8917a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_8ba37b7a-7070-4f5e-bd8d-119758ec2476" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d31eaf1a-3aa4-4f26-95b2-678cc1feb94f" xlink:to="loc_us-gaap_PerformanceSharesMember_8ba37b7a-7070-4f5e-bd8d-119758ec2476" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3b4f8604-f45d-4901-90ca-153a27a22cb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3b4f8604-f45d-4901-90ca-153a27a22cb3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d6c806e4-e51a-4dd9-acc4-9484f1094603" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3b4f8604-f45d-4901-90ca-153a27a22cb3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_d6c806e4-e51a-4dd9-acc4-9484f1094603" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7ca31dfc-ecde-43e4-a706-ff058edb107a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3b4f8604-f45d-4901-90ca-153a27a22cb3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_7ca31dfc-ecde-43e4-a706-ff058edb107a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6c8ca4d4-60f4-4826-9f40-27752a87b1d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3b4f8604-f45d-4901-90ca-153a27a22cb3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6c8ca4d4-60f4-4826-9f40-27752a87b1d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_3cec87db-07d5-499f-ab15-24978e4e7d7c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_3b4f8604-f45d-4901-90ca-153a27a22cb3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_3cec87db-07d5-499f-ab15-24978e4e7d7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ca0de28f-1915-45c5-bc3f-526c6361fce0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestNumberofSharesOutstanding_a945e91f-3bc3-41af-bb2b-f759ac4a16ab" xlink:href="car-20250630.xsd#car_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestNumberofSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_car_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestNumberofSharesOutstanding_a945e91f-3bc3-41af-bb2b-f759ac4a16ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_89cb2bc3-0f9f-4eeb-ae76-08438ab05c2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_89cb2bc3-0f9f-4eeb-ae76-08438ab05c2b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d081311d-ac8a-41e3-95cf-7c41b0fc16eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_89cb2bc3-0f9f-4eeb-ae76-08438ab05c2b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_d081311d-ac8a-41e3-95cf-7c41b0fc16eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_5c715248-6457-401a-b619-0ccc4f5c6c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_89cb2bc3-0f9f-4eeb-ae76-08438ab05c2b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_5c715248-6457-401a-b619-0ccc4f5c6c5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_ffe2d2ff-a815-45a8-9c7a-dc83f5489847" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_89cb2bc3-0f9f-4eeb-ae76-08438ab05c2b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_ffe2d2ff-a815-45a8-9c7a-dc83f5489847" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_c3af0da7-8395-41f7-8396-b2c8fb030ded" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_89cb2bc3-0f9f-4eeb-ae76-08438ab05c2b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_c3af0da7-8395-41f7-8396-b2c8fb030ded" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_cec6f610-e8c8-4a9f-8fb6-3bd38938c443" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestWeightedAverageGrantDateFairValue_21d983be-c933-4acb-a8c3-50cae2f50e59" xlink:href="car-20250630.xsd#car_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_car_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpectedtoVestWeightedAverageGrantDateFairValue_21d983be-c933-4acb-a8c3-50cae2f50e59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageRemainingContractualTerm_e48c7f1c-a755-4081-a304-d498c3106efd" xlink:href="car-20250630.xsd#car_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageRemainingContractualTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_car_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageRemainingContractualTerm_e48c7f1c-a755-4081-a304-d498c3106efd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_788dd001-7317-4049-bfca-661886a562d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_788dd001-7317-4049-bfca-661886a562d8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExpectedToVest_8d3a517c-4f79-4e11-b309-60fc4ce942da" xlink:href="car-20250630.xsd#car_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExpectedToVest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_car_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExpectedToVest_8d3a517c-4f79-4e11-b309-60fc4ce942da" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_f19bd142-50c3-4774-9839-3362d929873c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_f19bd142-50c3-4774-9839-3362d929873c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_69cb27cd-e2cd-4778-a1e4-59d9865ccbd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_69cb27cd-e2cd-4778-a1e4-59d9865ccbd3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_eba2fb6c-a8ca-4761-aa5f-72709643f3e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_eba2fb6c-a8ca-4761-aa5f-72709643f3e1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_cac981ab-7169-414e-a9d7-c7710c42cb92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_69fc3c74-f12f-4b57-8d96-6e9b5e47dc51" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_cac981ab-7169-414e-a9d7-c7710c42cb92" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/FinancialInstrumentsScheduleofNotationalAmountsofDerivativesHeldDetails" xlink:type="simple" xlink:href="car-20250630.xsd#FinancialInstrumentsScheduleofNotationalAmountsofDerivativesHeldDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/FinancialInstrumentsScheduleofNotationalAmountsofDerivativesHeldDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_aed4c067-68c9-4d20-86aa-581406bc057e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_e2276264-882b-49b9-875a-cf66e8282b19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_aed4c067-68c9-4d20-86aa-581406bc057e" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_e2276264-882b-49b9-875a-cf66e8282b19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_ed192d12-31f5-4072-a815-aee4f4778a31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_e2276264-882b-49b9-875a-cf66e8282b19" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_ed192d12-31f5-4072-a815-aee4f4778a31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ed192d12-31f5-4072-a815-aee4f4778a31_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ed192d12-31f5-4072-a815-aee4f4778a31" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ed192d12-31f5-4072-a815-aee4f4778a31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ed192d12-31f5-4072-a815-aee4f4778a31" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_5810a0fb-563f-42f3-bdea-110e36933947" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:to="loc_us-gaap_CurrencySwapMember_5810a0fb-563f-42f3-bdea-110e36933947" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InterestRateCapsMember_f52c84c8-58f0-43f4-9f64-32217dfb3369" xlink:href="car-20250630.xsd#car_InterestRateCapsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:to="loc_car_InterestRateCapsMember_f52c84c8-58f0-43f4-9f64-32217dfb3369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_30e18f37-9850-4419-8424-f0b88f2a672c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:to="loc_us-gaap_InterestRateSwapMember_30e18f37-9850-4419-8424-f0b88f2a672c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SoldMember_92c7c7f1-23ef-4192-96d9-69ef381de95c" xlink:href="car-20250630.xsd#car_SoldMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:to="loc_car_SoldMember_92c7c7f1-23ef-4192-96d9-69ef381de95c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_PurchaseMember_329321df-92fa-4546-a28c-e65e2e117cca" xlink:href="car-20250630.xsd#car_PurchaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caf53af6-3904-4539-b41f-52de64b89130" xlink:to="loc_car_PurchaseMember_329321df-92fa-4546-a28c-e65e2e117cca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_d78e9e1a-6c12-4c4e-bf92-cd4325a3822a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_e2276264-882b-49b9-875a-cf66e8282b19" xlink:to="loc_srt_ConsolidatedEntitiesAxis_d78e9e1a-6c12-4c4e-bf92-cd4325a3822a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_d78e9e1a-6c12-4c4e-bf92-cd4325a3822a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_d78e9e1a-6c12-4c4e-bf92-cd4325a3822a" xlink:to="loc_srt_ConsolidatedEntitiesDomain_d78e9e1a-6c12-4c4e-bf92-cd4325a3822a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_a513c349-9bce-4e0c-99fb-9d42c0510f2e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_d78e9e1a-6c12-4c4e-bf92-cd4325a3822a" xlink:to="loc_srt_ConsolidatedEntitiesDomain_a513c349-9bce-4e0c-99fb-9d42c0510f2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SubsidiariesMember_20b3bdb3-1a22-4f3a-9f56-75893cb929e2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_a513c349-9bce-4e0c-99fb-9d42c0510f2e" xlink:to="loc_srt_SubsidiariesMember_20b3bdb3-1a22-4f3a-9f56-75893cb929e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_bcb35ced-54a1-4f4e-877a-abf6696715a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_aed4c067-68c9-4d20-86aa-581406bc057e" xlink:to="loc_us-gaap_DerivativeNotionalAmount_bcb35ced-54a1-4f4e-877a-abf6696715a0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/FinancialInstrumentsScheduleofFairValuesofDerivativesInstrumentsDetails" xlink:type="simple" xlink:href="car-20250630.xsd#FinancialInstrumentsScheduleofFairValuesofDerivativesInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/FinancialInstrumentsScheduleofFairValuesofDerivativesInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_e15a9b76-936f-46d8-9a11-6c6c797982a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_9d6211ee-429b-4797-af4e-3d523ee73077" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_e15a9b76-936f-46d8-9a11-6c6c797982a6" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_9d6211ee-429b-4797-af4e-3d523ee73077" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_9dbd81a0-331a-4633-81d4-b2963d6c3b75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_9d6211ee-429b-4797-af4e-3d523ee73077" xlink:to="loc_us-gaap_HedgingDesignationAxis_9dbd81a0-331a-4633-81d4-b2963d6c3b75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_9dbd81a0-331a-4633-81d4-b2963d6c3b75_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_9dbd81a0-331a-4633-81d4-b2963d6c3b75" xlink:to="loc_us-gaap_HedgingDesignationDomain_9dbd81a0-331a-4633-81d4-b2963d6c3b75_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_575fc492-8277-41cf-9cf2-92b62cf28ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_9dbd81a0-331a-4633-81d4-b2963d6c3b75" xlink:to="loc_us-gaap_HedgingDesignationDomain_575fc492-8277-41cf-9cf2-92b62cf28ac2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_3c25141b-1082-4e41-a33b-2c6691a760b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_575fc492-8277-41cf-9cf2-92b62cf28ac2" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_3c25141b-1082-4e41-a33b-2c6691a760b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_23b1b4f9-53aa-45c7-8d81-d2912ac38729" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_575fc492-8277-41cf-9cf2-92b62cf28ac2" xlink:to="loc_us-gaap_NondesignatedMember_23b1b4f9-53aa-45c7-8d81-d2912ac38729" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_d62d62df-4487-474c-a47a-f8a90ee9cd26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_9d6211ee-429b-4797-af4e-3d523ee73077" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_d62d62df-4487-474c-a47a-f8a90ee9cd26" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d62d62df-4487-474c-a47a-f8a90ee9cd26_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d62d62df-4487-474c-a47a-f8a90ee9cd26" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d62d62df-4487-474c-a47a-f8a90ee9cd26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_f3ada2cc-cb9f-4180-ad79-a04b811e38a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d62d62df-4487-474c-a47a-f8a90ee9cd26" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_f3ada2cc-cb9f-4180-ad79-a04b811e38a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_28ced61a-6629-4ae6-88db-fad6421034d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f3ada2cc-cb9f-4180-ad79-a04b811e38a2" xlink:to="loc_us-gaap_InterestRateSwapMember_28ced61a-6629-4ae6-88db-fad6421034d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_d11bfab3-1c56-4582-b481-fcf7167ef127" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f3ada2cc-cb9f-4180-ad79-a04b811e38a2" xlink:to="loc_us-gaap_ForeignExchangeContractMember_d11bfab3-1c56-4582-b481-fcf7167ef127" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_c01ea5ea-1fc5-4ab5-887d-2e63230313cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f3ada2cc-cb9f-4180-ad79-a04b811e38a2" xlink:to="loc_us-gaap_InterestRateContractMember_c01ea5ea-1fc5-4ab5-887d-2e63230313cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_d0f2d65c-6d6e-4088-939a-9443584c81cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_e15a9b76-936f-46d8-9a11-6c6c797982a6" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_d0f2d65c-6d6e-4088-939a-9443584c81cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_3e7241c3-3292-41ee-841c-476614df0251" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_e15a9b76-936f-46d8-9a11-6c6c797982a6" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_3e7241c3-3292-41ee-841c-476614df0251" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/FinancialInstrumentsScheduleofEffectsofDerivativesRecognizedDetails" xlink:type="simple" xlink:href="car-20250630.xsd#FinancialInstrumentsScheduleofEffectsofDerivativesRecognizedDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/FinancialInstrumentsScheduleofEffectsofDerivativesRecognizedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_c97ea502-5ab2-4fb7-a5bf-b72278301159" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_58186048-e06a-40b7-b4ce-08fa4fb958db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_c97ea502-5ab2-4fb7-a5bf-b72278301159" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_58186048-e06a-40b7-b4ce-08fa4fb958db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_ff143e34-7259-4b86-85d0-87615eb1d2c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_58186048-e06a-40b7-b4ce-08fa4fb958db" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_ff143e34-7259-4b86-85d0-87615eb1d2c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ff143e34-7259-4b86-85d0-87615eb1d2c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ff143e34-7259-4b86-85d0-87615eb1d2c3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ff143e34-7259-4b86-85d0-87615eb1d2c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_3bcf7f59-f56e-4479-bc78-4ef840c00701" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_ff143e34-7259-4b86-85d0-87615eb1d2c3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_3bcf7f59-f56e-4479-bc78-4ef840c00701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_7bd23b2c-82e0-46fc-91c7-2d49144cf6db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3bcf7f59-f56e-4479-bc78-4ef840c00701" xlink:to="loc_us-gaap_InterestRateSwapMember_7bd23b2c-82e0-46fc-91c7-2d49144cf6db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_EuroDenominatedNotesMember_0e9c6616-dd9b-4325-9de2-c7c4495651ea" xlink:href="car-20250630.xsd#car_EuroDenominatedNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3bcf7f59-f56e-4479-bc78-4ef840c00701" xlink:to="loc_car_EuroDenominatedNotesMember_0e9c6616-dd9b-4325-9de2-c7c4495651ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_453794b8-e232-41e2-ace6-73dfdc3b4602" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_3bcf7f59-f56e-4479-bc78-4ef840c00701" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_453794b8-e232-41e2-ace6-73dfdc3b4602" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_e4d75778-cf7f-4601-9916-aa1e74d428b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_58186048-e06a-40b7-b4ce-08fa4fb958db" xlink:to="loc_us-gaap_HedgingDesignationAxis_e4d75778-cf7f-4601-9916-aa1e74d428b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_e4d75778-cf7f-4601-9916-aa1e74d428b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_e4d75778-cf7f-4601-9916-aa1e74d428b7" xlink:to="loc_us-gaap_HedgingDesignationDomain_e4d75778-cf7f-4601-9916-aa1e74d428b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_729bbb74-87bb-4f53-adc5-f295d610da8f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_e4d75778-cf7f-4601-9916-aa1e74d428b7" xlink:to="loc_us-gaap_HedgingDesignationDomain_729bbb74-87bb-4f53-adc5-f295d610da8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_750eb28d-c5bc-4734-9717-94f3a7c1f721" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_729bbb74-87bb-4f53-adc5-f295d610da8f" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_750eb28d-c5bc-4734-9717-94f3a7c1f721" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_9d4bd598-6e59-42fc-bf61-40e3b7a0339c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_729bbb74-87bb-4f53-adc5-f295d610da8f" xlink:to="loc_us-gaap_NondesignatedMember_9d4bd598-6e59-42fc-bf61-40e3b7a0339c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_0614d310-062e-46ff-a924-b9d244633631" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_c97ea502-5ab2-4fb7-a5bf-b72278301159" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_0614d310-062e-46ff-a924-b9d244633631" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/FinancialInstrumentsScheduleofCarryingAmountsandEstimatedFairValuesDetails" xlink:type="simple" xlink:href="car-20250630.xsd#FinancialInstrumentsScheduleofCarryingAmountsandEstimatedFairValuesDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/FinancialInstrumentsScheduleofCarryingAmountsandEstimatedFairValuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_245bea6a-5fd5-4977-be15-1448fc31b2e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_245bea6a-5fd5-4977-be15-1448fc31b2e1" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_4138d94f-b1fb-4077-8d0c-d680863483a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_4138d94f-b1fb-4077-8d0c-d680863483a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_4138d94f-b1fb-4077-8d0c-d680863483a4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_4138d94f-b1fb-4077-8d0c-d680863483a4" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_4138d94f-b1fb-4077-8d0c-d680863483a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d55880a-42d9-4b14-9aaf-9fe96c89fa15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_4138d94f-b1fb-4077-8d0c-d680863483a4" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d55880a-42d9-4b14-9aaf-9fe96c89fa15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2767c7ff-1bb9-498f-94ab-c130844fc69d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d55880a-42d9-4b14-9aaf-9fe96c89fa15" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2767c7ff-1bb9-498f-94ab-c130844fc69d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_ab4fde98-ffab-48bf-9c55-e23952bdaf9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2767c7ff-1bb9-498f-94ab-c130844fc69d" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_ab4fde98-ffab-48bf-9c55-e23952bdaf9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_efe8206e-3f81-4cf3-aab5-b050b41ef925" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_2767c7ff-1bb9-498f-94ab-c130844fc69d" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_efe8206e-3f81-4cf3-aab5-b050b41ef925" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_47bd2e57-02b8-4daf-bc38-ecedc195a479" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:to="loc_srt_CounterpartyNameAxis_47bd2e57-02b8-4daf-bc38-ecedc195a479" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_47bd2e57-02b8-4daf-bc38-ecedc195a479_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_47bd2e57-02b8-4daf-bc38-ecedc195a479" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_47bd2e57-02b8-4daf-bc38-ecedc195a479_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_04e8988a-de22-4c38-b5a7-f2e41133582e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_47bd2e57-02b8-4daf-bc38-ecedc195a479" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_04e8988a-de22-4c38-b5a7-f2e41133582e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AvisBudgetRentalCarFundingMember_82adc656-4720-49d2-902c-78e13cf5a85f" xlink:href="car-20250630.xsd#car_AvisBudgetRentalCarFundingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_04e8988a-de22-4c38-b5a7-f2e41133582e" xlink:to="loc_car_AvisBudgetRentalCarFundingMember_82adc656-4720-49d2-902c-78e13cf5a85f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_21bbbd8c-b51b-48ab-bf32-d2b7188de4cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:to="loc_us-gaap_DebtInstrumentAxis_21bbbd8c-b51b-48ab-bf32-d2b7188de4cb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_21bbbd8c-b51b-48ab-bf32-d2b7188de4cb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_21bbbd8c-b51b-48ab-bf32-d2b7188de4cb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_21bbbd8c-b51b-48ab-bf32-d2b7188de4cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_1ffaed50-ca56-4073-95a6-3b9c2bc59c75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_21bbbd8c-b51b-48ab-bf32-d2b7188de4cb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_1ffaed50-ca56-4073-95a6-3b9c2bc59c75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleBackedDebtMember_06cd6af9-e2a0-4151-8234-6844a4f38e94" xlink:href="car-20250630.xsd#car_VehicleBackedDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_1ffaed50-ca56-4073-95a6-3b9c2bc59c75" xlink:to="loc_car_VehicleBackedDebtMember_06cd6af9-e2a0-4151-8234-6844a4f38e94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_f5165b40-b49b-463a-a29d-04e3d9706e13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_f5165b40-b49b-463a-a29d-04e3d9706e13" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_f5165b40-b49b-463a-a29d-04e3d9706e13_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_f5165b40-b49b-463a-a29d-04e3d9706e13" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_f5165b40-b49b-463a-a29d-04e3d9706e13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d2bd3f64-4e45-4283-b65a-766a41e3497e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_f5165b40-b49b-463a-a29d-04e3d9706e13" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d2bd3f64-4e45-4283-b65a-766a41e3497e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_392d877e-7658-41e7-a64b-d3c585acb31b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_d2bd3f64-4e45-4283-b65a-766a41e3497e" xlink:to="loc_us-gaap_InterestRateContractMember_392d877e-7658-41e7-a64b-d3c585acb31b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7492d254-b333-48a0-9d90-bd34b7a51091" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_c2a8bbc3-943b-4492-bd15-9f49deab35e1" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7492d254-b333-48a0-9d90-bd34b7a51091" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7492d254-b333-48a0-9d90-bd34b7a51091_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7492d254-b333-48a0-9d90-bd34b7a51091" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7492d254-b333-48a0-9d90-bd34b7a51091_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a285b75e-a0d4-41df-ae24-a921c033b5ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7492d254-b333-48a0-9d90-bd34b7a51091" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a285b75e-a0d4-41df-ae24-a921c033b5ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_a12d1439-9afa-4ea3-af7f-2ace93155cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a285b75e-a0d4-41df-ae24-a921c033b5ea" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_a12d1439-9afa-4ea3-af7f-2ace93155cb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_8d94f572-30d9-4de7-b822-f4824aea782b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_245bea6a-5fd5-4977-be15-1448fc31b2e1" xlink:to="loc_us-gaap_LongTermDebtCurrent_8d94f572-30d9-4de7-b822-f4824aea782b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_5aba8465-ea9d-443f-9cee-5e530946b6fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_245bea6a-5fd5-4977-be15-1448fc31b2e1" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_5aba8465-ea9d-443f-9cee-5e530946b6fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_a2afb747-86d0-48f4-91c1-f95d69ccb4eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_245bea6a-5fd5-4977-be15-1448fc31b2e1" xlink:to="loc_us-gaap_DebtInstrumentFairValue_a2afb747-86d0-48f4-91c1-f95d69ccb4eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_2a1f3909-3d04-4e5e-968d-76eeaee4edf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_245bea6a-5fd5-4977-be15-1448fc31b2e1" xlink:to="loc_us-gaap_DerivativeLiabilities_2a1f3909-3d04-4e5e-968d-76eeaee4edf8" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/SegmentInformationScheduleofSegmentsInformationDetails" xlink:type="simple" xlink:href="car-20250630.xsd#SegmentInformationScheduleofSegmentsInformationDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/SegmentInformationScheduleofSegmentsInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_678ddac8-3cfb-4c75-a3e6-2a0fc9b4a0f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0bcf1ffc-8b93-4ad7-a535-668c6b2965a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_678ddac8-3cfb-4c75-a3e6-2a0fc9b4a0f8" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0bcf1ffc-8b93-4ad7-a535-668c6b2965a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_a9357a81-53b5-4ba7-91fd-bb48e5d89014" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0bcf1ffc-8b93-4ad7-a535-668c6b2965a3" xlink:to="loc_srt_ConsolidationItemsAxis_a9357a81-53b5-4ba7-91fd-bb48e5d89014" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_a9357a81-53b5-4ba7-91fd-bb48e5d89014_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_a9357a81-53b5-4ba7-91fd-bb48e5d89014" xlink:to="loc_srt_ConsolidationItemsDomain_a9357a81-53b5-4ba7-91fd-bb48e5d89014_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_843eefb9-f550-4b70-9a46-2e9318b3177d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_a9357a81-53b5-4ba7-91fd-bb48e5d89014" xlink:to="loc_srt_ConsolidationItemsDomain_843eefb9-f550-4b70-9a46-2e9318b3177d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_6cf466b3-cf1c-4fc7-ae0b-c3a42e78df88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_843eefb9-f550-4b70-9a46-2e9318b3177d" xlink:to="loc_us-gaap_OperatingSegmentsMember_6cf466b3-cf1c-4fc7-ae0b-c3a42e78df88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_32dfd891-63e5-49e9-b609-01449e095369" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_843eefb9-f550-4b70-9a46-2e9318b3177d" xlink:to="loc_us-gaap_CorporateNonSegmentMember_32dfd891-63e5-49e9-b609-01449e095369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_8cb6e793-9b56-40ef-bfcc-ea3659caf926" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0bcf1ffc-8b93-4ad7-a535-668c6b2965a3" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_8cb6e793-9b56-40ef-bfcc-ea3659caf926" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_8cb6e793-9b56-40ef-bfcc-ea3659caf926_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8cb6e793-9b56-40ef-bfcc-ea3659caf926" xlink:to="loc_us-gaap_SegmentDomain_8cb6e793-9b56-40ef-bfcc-ea3659caf926_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3d5b1fb1-ed68-4a4d-ac21-679ff794aceb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8cb6e793-9b56-40ef-bfcc-ea3659caf926" xlink:to="loc_us-gaap_SegmentDomain_3d5b1fb1-ed68-4a4d-ac21-679ff794aceb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AmericasSegmentMember_c062e77d-eeff-4b6e-a136-ce6eae285a05" xlink:href="car-20250630.xsd#car_AmericasSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3d5b1fb1-ed68-4a4d-ac21-679ff794aceb" xlink:to="loc_car_AmericasSegmentMember_c062e77d-eeff-4b6e-a136-ce6eae285a05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalMember_685b717a-ded3-4452-8ce6-d4d2b5616f58" xlink:href="car-20250630.xsd#car_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3d5b1fb1-ed68-4a4d-ac21-679ff794aceb" xlink:to="loc_car_InternationalMember_685b717a-ded3-4452-8ce6-d4d2b5616f58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_588fbd98-c0ef-4a20-8db2-34b888fd1185" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_678ddac8-3cfb-4c75-a3e6-2a0fc9b4a0f8" xlink:to="loc_us-gaap_Revenues_588fbd98-c0ef-4a20-8db2-34b888fd1185" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:href="car-20250630.xsd#car_SegmentExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_678ddac8-3cfb-4c75-a3e6-2a0fc9b4a0f8" xlink:to="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_27b0c1c4-fb0a-42af-8970-c4d39f09b427" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:to="loc_us-gaap_OperatingCostsAndExpenses_27b0c1c4-fb0a-42af-8970-c4d39f09b427" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciation_0823f987-fb72-448d-a9b6-9ed7a8fcd77f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSoldDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciation_0823f987-fb72-448d-a9b6-9ed7a8fcd77f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_a1fa93a8-6a6f-43f2-a62d-c01b9198ad73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_a1fa93a8-6a6f-43f2-a62d-c01b9198ad73" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_VehicleInterestNet_cf163ec5-11b4-4c78-b857-8f445b9eb04d" xlink:href="car-20250630.xsd#car_VehicleInterestNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:to="loc_car_VehicleInterestNet_cf163ec5-11b4-4c78-b857-8f445b9eb04d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AdjustedEarningsBeforeIncomeDepreciationAndAmortization_a9ba6d65-5e32-4dd8-91a9-ad055a20d9b7" xlink:href="car-20250630.xsd#car_AdjustedEarningsBeforeIncomeDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_SegmentExpensesAbstract_ebd79565-1f93-40cd-8c77-c037fdc6002e" xlink:to="loc_car_AdjustedEarningsBeforeIncomeDepreciationAndAmortization_a9ba6d65-5e32-4dd8-91a9-ad055a20d9b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:href="car-20250630.xsd#car_AdjustmentsToEBITDAAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_678ddac8-3cfb-4c75-a3e6-2a0fc9b4a0f8" xlink:to="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_NonVehicleRelatedDepreciationAndAmortization_494cfc0d-a8f2-4109-af4f-08d693e116de" xlink:href="car-20250630.xsd#car_NonVehicleRelatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_car_NonVehicleRelatedDepreciationAndAmortization_494cfc0d-a8f2-4109-af4f-08d693e116de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_64d7e93e-406c-4fea-8ad8-2d38e70ff850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_64d7e93e-406c-4fea-8ad8-2d38e70ff850" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_OtherFleetCharges_7a0cb070-e253-4e7e-92f3-619e896f638c" xlink:href="car-20250630.xsd#car_OtherFleetCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_car_OtherFleetCharges_7a0cb070-e253-4e7e-92f3-619e896f638c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_522769ab-eaf4-4f5d-9fc4-b9e5cc88f7b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_us-gaap_RestructuringCharges_522769ab-eaf4-4f5d-9fc4-b9e5cc88f7b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_TransactionRelatedCostsNet_1e0a73ee-17f4-4650-b52b-0b130e3077ae" xlink:href="car-20250630.xsd#car_TransactionRelatedCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_car_TransactionRelatedCostsNet_1e0a73ee-17f4-4650-b52b-0b130e3077ae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_fb5e05ee-6147-4fcb-95b6-f92d0e933142" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_fb5e05ee-6147-4fcb-95b6-f92d0e933142" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_LegalMattersNetCloudComputingCostsAndSevereWeatherRelatedDamagesNet_c223f494-fa6c-433a-91ae-73e83f95d2a3" xlink:href="car-20250630.xsd#car_LegalMattersNetCloudComputingCostsAndSevereWeatherRelatedDamagesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_car_LegalMattersNetCloudComputingCostsAndSevereWeatherRelatedDamagesNet_c223f494-fa6c-433a-91ae-73e83f95d2a3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_CorporateAndOthers_e34556bc-ee8f-429d-a7fc-cf5a04ac50ee" xlink:href="car-20250630.xsd#car_CorporateAndOthers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_car_CorporateAndOthers_e34556bc-ee8f-429d-a7fc-cf5a04ac50ee" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_9bd99106-1feb-464b-93cb-20a9d30a97b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_car_AdjustmentsToEBITDAAbstract_399a7c54-c159-4c71-961a-c989994ef07f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_9bd99106-1feb-464b-93cb-20a9d30a97b1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_2ab1e939-e99d-4261-b323-4d7a1af5bf7e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_678ddac8-3cfb-4c75-a3e6-2a0fc9b4a0f8" xlink:to="loc_us-gaap_InterestExpense_2ab1e939-e99d-4261-b323-4d7a1af5bf7e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/SegmentInformationScheduleofSegmentAssetsDetails" xlink:type="simple" xlink:href="car-20250630.xsd#SegmentInformationScheduleofSegmentAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/SegmentInformationScheduleofSegmentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a28f7af5-57f8-4982-8b3d-280249e1f78d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_fa72a56b-856c-4220-b691-a916ab6c2f97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a28f7af5-57f8-4982-8b3d-280249e1f78d" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_fa72a56b-856c-4220-b691-a916ab6c2f97" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_e102c80c-cdaf-4025-a591-d37f67e6c1bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_fa72a56b-856c-4220-b691-a916ab6c2f97" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_e102c80c-cdaf-4025-a591-d37f67e6c1bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e102c80c-cdaf-4025-a591-d37f67e6c1bb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e102c80c-cdaf-4025-a591-d37f67e6c1bb" xlink:to="loc_us-gaap_SegmentDomain_e102c80c-cdaf-4025-a591-d37f67e6c1bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_be0ff031-1ab1-4843-8ec2-8f430984319e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e102c80c-cdaf-4025-a591-d37f67e6c1bb" xlink:to="loc_us-gaap_SegmentDomain_be0ff031-1ab1-4843-8ec2-8f430984319e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AmericasSegmentMember_585d0981-0f78-4d28-b015-7d563b00172f" xlink:href="car-20250630.xsd#car_AmericasSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be0ff031-1ab1-4843-8ec2-8f430984319e" xlink:to="loc_car_AmericasSegmentMember_585d0981-0f78-4d28-b015-7d563b00172f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_InternationalMember_189ebcad-7ed5-4f21-9188-92d8313c2266" xlink:href="car-20250630.xsd#car_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be0ff031-1ab1-4843-8ec2-8f430984319e" xlink:to="loc_car_InternationalMember_189ebcad-7ed5-4f21-9188-92d8313c2266" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_UnallocatedAssetsSegmentMember_90b6cf7a-366d-43c6-9534-a59de705a283" xlink:href="car-20250630.xsd#car_UnallocatedAssetsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be0ff031-1ab1-4843-8ec2-8f430984319e" xlink:to="loc_car_UnallocatedAssetsSegmentMember_90b6cf7a-366d-43c6-9534-a59de705a283" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_d3f2ebe2-5ecc-4f3b-bddb-b5db7a2d0652" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentExpenditureAdditionToLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a28f7af5-57f8-4982-8b3d-280249e1f78d" xlink:to="loc_us-gaap_SegmentExpenditureAdditionToLongLivedAssets_d3f2ebe2-5ecc-4f3b-bddb-b5db7a2d0652" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_SegmentAssetsExclusiveOfAssetsUnderVehicleProgram_af9e5670-2e28-4ae4-a2ba-79d336aed98c" xlink:href="car-20250630.xsd#car_SegmentAssetsExclusiveOfAssetsUnderVehicleProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a28f7af5-57f8-4982-8b3d-280249e1f78d" xlink:to="loc_car_SegmentAssetsExclusiveOfAssetsUnderVehicleProgram_af9e5670-2e28-4ae4-a2ba-79d336aed98c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_AssetsUnderVehiclePrograms_52c98c75-a111-458b-b541-0011075e5423" xlink:href="car-20250630.xsd#car_AssetsUnderVehiclePrograms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a28f7af5-57f8-4982-8b3d-280249e1f78d" xlink:to="loc_car_AssetsUnderVehiclePrograms_52c98c75-a111-458b-b541-0011075e5423" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_5812113b-ddfc-430f-82a4-2ced7f81b3cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a28f7af5-57f8-4982-8b3d-280249e1f78d" xlink:to="loc_us-gaap_NoncurrentAssets_5812113b-ddfc-430f-82a4-2ced7f81b3cd" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.avis.com/role/SubsequentEventDetails" xlink:type="simple" xlink:href="car-20250630.xsd#SubsequentEventDetails"/>
  <link:definitionLink xlink:role="http://www.avis.com/role/SubsequentEventDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_59bba7a7-4459-4e62-b13b-1f08681fb354" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_6e21517c-17b7-45b9-9615-7caa500f0070" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_59bba7a7-4459-4e62-b13b-1f08681fb354" xlink:to="loc_us-gaap_SubsequentEventTable_6e21517c-17b7-45b9-9615-7caa500f0070" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_71fdbc8d-d18e-4fa0-aae6-6ff95f243520" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_6e21517c-17b7-45b9-9615-7caa500f0070" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_71fdbc8d-d18e-4fa0-aae6-6ff95f243520" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_71fdbc8d-d18e-4fa0-aae6-6ff95f243520_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_71fdbc8d-d18e-4fa0-aae6-6ff95f243520" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_71fdbc8d-d18e-4fa0-aae6-6ff95f243520_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_384674a2-ed4a-4799-8081-e19cda4c37c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_71fdbc8d-d18e-4fa0-aae6-6ff95f243520" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_384674a2-ed4a-4799-8081-e19cda4c37c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_6007d6d2-90a9-46a9-a471-3ca60f3a32eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_384674a2-ed4a-4799-8081-e19cda4c37c5" xlink:to="loc_us-gaap_SubsequentEventMember_6007d6d2-90a9-46a9-a471-3ca60f3a32eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_3a195ce7-216b-46fd-9368-9f18d4bdef98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_6e21517c-17b7-45b9-9615-7caa500f0070" xlink:to="loc_us-gaap_DebtInstrumentAxis_3a195ce7-216b-46fd-9368-9f18d4bdef98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3a195ce7-216b-46fd-9368-9f18d4bdef98_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_3a195ce7-216b-46fd-9368-9f18d4bdef98" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3a195ce7-216b-46fd-9368-9f18d4bdef98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0ad54b5a-9419-4f4a-b140-ada6c08ff9ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_3a195ce7-216b-46fd-9368-9f18d4bdef98" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0ad54b5a-9419-4f4a-b140-ada6c08ff9ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_car_FloatingRateTermLoanDueJulyTwoThousandThirtyTwoMember_88f200c6-2f76-4ca9-9485-5f5d0613dd7c" xlink:href="car-20250630.xsd#car_FloatingRateTermLoanDueJulyTwoThousandThirtyTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0ad54b5a-9419-4f4a-b140-ada6c08ff9ed" xlink:to="loc_car_FloatingRateTermLoanDueJulyTwoThousandThirtyTwoMember_88f200c6-2f76-4ca9-9485-5f5d0613dd7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_077785fa-c301-4731-b789-ceecfe5c38a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_6e21517c-17b7-45b9-9615-7caa500f0070" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_077785fa-c301-4731-b789-ceecfe5c38a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_077785fa-c301-4731-b789-ceecfe5c38a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_077785fa-c301-4731-b789-ceecfe5c38a6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_077785fa-c301-4731-b789-ceecfe5c38a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_93600ff5-fa1c-4f4e-994c-9a614b2a4caf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_077785fa-c301-4731-b789-ceecfe5c38a6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_93600ff5-fa1c-4f4e-994c-9a614b2a4caf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansPayableMember_c0e2dcd5-ba8c-4e32-811b-4e7eeecb4669" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_93600ff5-fa1c-4f4e-994c-9a614b2a4caf" xlink:to="loc_us-gaap_LoansPayableMember_c0e2dcd5-ba8c-4e32-811b-4e7eeecb4669" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_2586d3ff-e528-4489-b5a0-aa481e225256" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_59bba7a7-4459-4e62-b13b-1f08681fb354" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_2586d3ff-e528-4489-b5a0-aa481e225256" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
