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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e4a92-2a9a-7d01-ae15-cb44c5411df4,g:576e7c0d-a0db-4465-9ba1-32be62ac3811-->
<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.fedexfreight.com/role/CONSOLIDATEDSTATEMENTSOFINCOME" xlink:type="simple" xlink:href="fdxf-20260531.xsd#CONSOLIDATEDSTATEMENTSOFINCOME"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/CONSOLIDATEDSTATEMENTSOFINCOME" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f8f33-3272-7292-88f7-eb954cdfaf69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f8f33-3272-7722-90ac-44b62919bcce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f8f33-3272-7292-88f7-eb954cdfaf69" xlink:to="loc_us-gaap_StatementTable_019f8f33-3272-7722-90ac-44b62919bcce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f8f33-3272-7619-8e4d-8082067472d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f8f33-3272-7722-90ac-44b62919bcce" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f8f33-3272-7619-8e4d-8082067472d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f8f33-3272-7619-8e4d-8082067472d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f8f33-3272-7619-8e4d-8082067472d1" xlink:to="loc_us-gaap_RelatedPartyDomain_019f8f33-3272-7619-8e4d-8082067472d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f8f33-3272-79a1-8ea1-9425876803b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f8f33-3272-7619-8e4d-8082067472d1" xlink:to="loc_us-gaap_RelatedPartyDomain_019f8f33-3272-79a1-8ea1-9425876803b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f8f33-3272-72ed-81db-95dfdf7b845a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f8f33-3272-79a1-8ea1-9425876803b6" xlink:to="loc_us-gaap_RelatedPartyMember_019f8f33-3272-72ed-81db-95dfdf7b845a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019f8f39-4cc8-7acf-8f32-6e28adf8e620" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f8f33-3272-79a1-8ea1-9425876803b6" xlink:to="loc_us-gaap_NonrelatedPartyMember_019f8f39-4cc8-7acf-8f32-6e28adf8e620" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f8f33-3272-7292-88f7-eb954cdfaf69" xlink:to="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eda8c-12d3-71e3-9f63-b737b0f9f5d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019eda8c-12d3-71e3-9f63-b737b0f9f5d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingCostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019eda8c-12d3-7496-917d-cd4e6e643e6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019eda8c-12d3-7496-917d-cd4e6e643e6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PurchasedTransportationCosts_019eda8c-12d3-71bb-9a21-3b627efca3c0" xlink:href="fdxf-20260531.xsd#fdxf_PurchasedTransportationCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_fdxf_PurchasedTransportationCosts_019eda8c-12d3-71bb-9a21-3b627efca3c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_Rentals_019eda8c-12d3-75a0-9c70-659a5edf6c97" xlink:href="fdxf-20260531.xsd#fdxf_Rentals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_fdxf_Rentals_019eda8c-12d3-75a0-9c70-659a5edf6c97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019eda8c-12d3-703b-b97d-43e3ef8342b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019eda8c-12d3-703b-b97d-43e3ef8342b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FuelCosts_019eda8c-12d3-7d1c-99c3-378e26544789" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FuelCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_us-gaap_FuelCosts_019eda8c-12d3-7d1c-99c3-378e26544789" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfPropertyRepairsAndMaintenance_019eda8c-12d3-74df-9c5b-3077c6508199" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfPropertyRepairsAndMaintenance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_us-gaap_CostOfPropertyRepairsAndMaintenance_019eda8c-12d3-74df-9c5b-3077c6508199" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_SeparationAndOtherCosts_019eda8c-12d3-7c84-92e5-e044765d1e2c" xlink:href="fdxf-20260531.xsd#fdxf_SeparationAndOtherCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_fdxf_SeparationAndOtherCosts_019eda8c-12d3-7c84-92e5-e044765d1e2c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019eda8c-12d3-75f9-98e2-f07ded6602a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019eda8c-12d3-75f9-98e2-f07ded6602a8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019eda8c-12d3-73fd-b0f5-3e2cb8353174" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingCostsAndExpensesAbstract_019eda8c-12d3-7df9-a202-efb63b97661d" xlink:to="loc_us-gaap_CostsAndExpenses_019eda8c-12d3-73fd-b0f5-3e2cb8353174" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019eda8c-12d3-7a8c-aa11-a3612c3ecb7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_OperatingIncomeLoss_019eda8c-12d3-7a8c-aa11-a3612c3ecb7b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eda8c-12d3-7756-839e-bc034f333371" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eda8c-12d3-7756-839e-bc034f333371" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019eda8c-12d3-7524-86cd-707b9bb1be4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eda8c-12d3-7756-839e-bc034f333371" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019eda8c-12d3-7524-86cd-707b9bb1be4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019eda8c-12d3-753e-b626-b15e1ebb37d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eda8c-12d3-7756-839e-bc034f333371" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019eda8c-12d3-753e-b626-b15e1ebb37d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019eda8c-12d3-7c6c-a06e-1880422ad80d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eda8c-12d3-7756-839e-bc034f333371" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019eda8c-12d3-7c6c-a06e-1880422ad80d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019eda8c-12d3-733c-b3bb-04b622a6c740" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_019eda8c-12d3-7756-839e-bc034f333371" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019eda8c-12d3-733c-b3bb-04b622a6c740" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019eda8c-12d3-7fdb-a83f-5da1e4fe390d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019eda8c-12d3-7fdb-a83f-5da1e4fe390d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019eda8c-12d3-784d-a86a-35844632a208" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019eda8c-12d3-784d-a86a-35844632a208" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019eda8c-12d3-7963-aa31-4c91b664774b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_NetIncomeLoss_019eda8c-12d3-7963-aa31-4c91b664774b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_019fb1f4-a0f2-7683-a3dc-05a4b4c30c51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_EarningsPerShareAbstract_019fb1f4-a0f2-7683-a3dc-05a4b4c30c51" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019eda8c-12d3-7def-8fe9-94e8ccf1e6ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019fb1f4-a0f2-7683-a3dc-05a4b4c30c51" xlink:to="loc_us-gaap_EarningsPerShareBasic_019eda8c-12d3-7def-8fe9-94e8ccf1e6ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019eda8c-12d3-7090-a1de-9c74517cd11c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019fb1f4-a0f2-7683-a3dc-05a4b4c30c51" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019eda8c-12d3-7090-a1de-9c74517cd11c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019fb1f5-960f-714f-8c25-4aeed6d7ffd1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract_019eda8c-12d3-793f-94b7-6efec1eb5f47" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019fb1f5-960f-714f-8c25-4aeed6d7ffd1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019fb1f2-43f2-7d66-adfb-35c94a340138" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019fb1f5-960f-714f-8c25-4aeed6d7ffd1" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019fb1f2-43f2-7d66-adfb-35c94a340138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019fb1f2-9177-70f8-9d7e-58cb50f08ab7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019fb1f5-960f-714f-8c25-4aeed6d7ffd1" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019fb1f2-9177-70f8-9d7e-58cb50f08ab7" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINEQUITY" xlink:type="simple" xlink:href="fdxf-20260531.xsd#CONSOLIDATEDSTATEMENTSOFCHANGESINEQUITY"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/CONSOLIDATEDSTATEMENTSOFCHANGESINEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019ed90a-b159-7998-8ff3-38e6de18abb0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019ed90a-b159-7f6e-bd9a-28f66da0f7e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019ed90a-b159-7998-8ff3-38e6de18abb0" xlink:to="loc_us-gaap_StatementTable_019ed90a-b159-7f6e-bd9a-28f66da0f7e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019ed90a-b159-77b7-8afb-739c06f592c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019ed90a-b159-7f6e-bd9a-28f66da0f7e2" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019ed90a-b159-77b7-8afb-739c06f592c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019ed90a-b159-77b7-8afb-739c06f592c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019ed90a-b159-77b7-8afb-739c06f592c5" xlink:to="loc_us-gaap_EquityComponentDomain_019ed90a-b159-77b7-8afb-739c06f592c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019ed90a-b159-7412-9c98-63d9e6725f97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019ed90a-b159-77b7-8afb-739c06f592c5" xlink:to="loc_us-gaap_EquityComponentDomain_019ed90a-b159-7412-9c98-63d9e6725f97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019ed90a-b159-7b13-8208-ae8cc5685a76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ed90a-b159-7412-9c98-63d9e6725f97" xlink:to="loc_us-gaap_CommonStockMember_019ed90a-b159-7b13-8208-ae8cc5685a76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019ed90a-b159-794d-b422-fe966688a90d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ed90a-b159-7412-9c98-63d9e6725f97" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019ed90a-b159-794d-b422-fe966688a90d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019ed90a-b159-72bf-998d-79fda3375005" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ed90a-b159-7412-9c98-63d9e6725f97" xlink:to="loc_us-gaap_RetainedEarningsMember_019ed90a-b159-72bf-998d-79fda3375005" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019ed90a-b159-7ad4-bd05-bbca3d2004f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019ed90a-b159-7412-9c98-63d9e6725f97" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019ed90a-b159-7ad4-bd05-bbca3d2004f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019ed90a-b159-7998-8ff3-38e6de18abb0" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019ed90a-b159-79ae-95a6-e65d9ed0840d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:to="loc_us-gaap_StockholdersEquity_019ed90a-b159-79ae-95a6-e65d9ed0840d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ed90a-b159-72bd-bd65-e9fcdb513ff6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:to="loc_us-gaap_NetIncomeLoss_019ed90a-b159-72bd-bd65-e9fcdb513ff6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019ed90a-b159-7a71-b3a3-c60782f567e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019ed90a-b159-7a71-b3a3-c60782f567e0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockIssuedDuringPeriodValueRecapitalization_019f3bec-8a3e-7a54-885e-7c8bb68aace0" xlink:href="fdxf-20260531.xsd#fdxf_StockIssuedDuringPeriodValueRecapitalization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:to="loc_fdxf_StockIssuedDuringPeriodValueRecapitalization_019f3bec-8a3e-7a54-885e-7c8bb68aace0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockholdersEquityNetTransfersFromToParent_019ed90a-b159-753e-bb17-b9c5ae9d9240" xlink:href="fdxf-20260531.xsd#fdxf_StockholdersEquityNetTransfersFromToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019ed90b-9689-7478-8b8d-9bddefe35ca5" xlink:to="loc_fdxf_StockholdersEquityNetTransfersFromToParent_019ed90a-b159-753e-bb17-b9c5ae9d9240" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019ed90d-61e1-7a6b-b1b6-e5fac23b51ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/DESCRIPTIONOFBUSINESSANDBASISOFPRESENTATIONDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#DESCRIPTIONOFBUSINESSANDBASISOFPRESENTATIONDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/DESCRIPTIONOFBUSINESSANDBASISOFPRESENTATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019f9532-6a2c-704c-9e71-60e05ffa3312" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_us-gaap_SubsequentEventTable_019f9532-6a2c-704c-9e71-60e05ffa3312" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019f9532-6a2c-70cc-b1fc-49d91299c8e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019f9532-6a2c-704c-9e71-60e05ffa3312" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019f9532-6a2c-70cc-b1fc-49d91299c8e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f9532-6a2c-70cc-b1fc-49d91299c8e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f9532-6a2c-70cc-b1fc-49d91299c8e7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f9532-6a2c-70cc-b1fc-49d91299c8e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f9532-6a2c-77fd-a8d1-89e810da0899" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f9532-6a2c-70cc-b1fc-49d91299c8e7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f9532-6a2c-77fd-a8d1-89e810da0899" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019f9532-aeaf-72bd-b5a3-efa2298154eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019f9532-6a2c-77fd-a8d1-89e810da0899" xlink:to="loc_us-gaap_SubsequentEventMember_019f9532-aeaf-72bd-b5a3-efa2298154eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockholdersEquitySeparationTransactionPercentOfOutstandingSharesDistributed_019f8ecc-7f63-71bb-b09f-fc0356df2a64" xlink:href="fdxf-20260531.xsd#fdxf_StockholdersEquitySeparationTransactionPercentOfOutstandingSharesDistributed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_fdxf_StockholdersEquitySeparationTransactionPercentOfOutstandingSharesDistributed_019f8ecc-7f63-71bb-b09f-fc0356df2a64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockholdersEquitySeparationTransactionSharesIssued_019f94ab-8512-7dbf-8f9d-e7432eac79c2" xlink:href="fdxf-20260531.xsd#fdxf_StockholdersEquitySeparationTransactionSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_fdxf_StockholdersEquitySeparationTransactionSharesIssued_019f94ab-8512-7dbf-8f9d-e7432eac79c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockholdersEquityIncorporationNumberOfSharesIssued_019f94ae-3af2-7190-9941-1220645aa21d" xlink:href="fdxf-20260531.xsd#fdxf_StockholdersEquityIncorporationNumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_fdxf_StockholdersEquityIncorporationNumberOfSharesIssued_019f94ae-3af2-7190-9941-1220645aa21d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_SeparationTransactionCommonStockSubscriptionReceivable_019f94b0-29cc-78f3-a006-a49966c35040" xlink:href="fdxf-20260531.xsd#fdxf_SeparationTransactionCommonStockSubscriptionReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_fdxf_SeparationTransactionCommonStockSubscriptionReceivable_019f94b0-29cc-78f3-a006-a49966c35040" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockIssuedDuringPeriodSharesRecapitalization_019fbd85-ba43-7bf7-8de1-ba0247d61c74" xlink:href="fdxf-20260531.xsd#fdxf_StockIssuedDuringPeriodSharesRecapitalization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_fdxf_StockIssuedDuringPeriodSharesRecapitalization_019fbd85-ba43-7bf7-8de1-ba0247d61c74" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019f8ecc-7f63-7ce4-b794-73206249f3b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f9532-6a2c-74ef-80f5-215123e807dd" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019f8ecc-7f63-7ce4-b794-73206249f3b9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f8f07-f6f1-7a71-8849-b363e56318b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f8f07-f6f1-7a71-8849-b363e56318b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationAxis_019f8f07-f6f1-7efe-99eb-8b0fd4ca16ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerDurationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f8f07-f6f1-7a71-8849-b363e56318b3" xlink:to="loc_us-gaap_ContractWithCustomerDurationAxis_019f8f07-f6f1-7efe-99eb-8b0fd4ca16ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7efe-99eb-8b0fd4ca16ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_019f8f07-f6f1-7efe-99eb-8b0fd4ca16ff" xlink:to="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7efe-99eb-8b0fd4ca16ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7577-a1cc-8b2613f42bae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerDurationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_019f8f07-f6f1-7efe-99eb-8b0fd4ca16ff" xlink:to="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7577-a1cc-8b2613f42bae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentIntervalOneMember_019f8f07-f6f1-7f5c-bcd8-e282a872d19b" xlink:href="fdxf-20260531.xsd#fdxf_PaymentIntervalOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7577-a1cc-8b2613f42bae" xlink:to="loc_fdxf_PaymentIntervalOneMember_019f8f07-f6f1-7f5c-bcd8-e282a872d19b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentIntervalTwoMember_019f8f07-f6f1-7dd9-9f4a-6e5d9381009e" xlink:href="fdxf-20260531.xsd#fdxf_PaymentIntervalTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7577-a1cc-8b2613f42bae" xlink:to="loc_fdxf_PaymentIntervalTwoMember_019f8f07-f6f1-7dd9-9f4a-6e5d9381009e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentIntervalThreeMember_019f8f07-f6f1-7230-89d1-c55ec40da4ba" xlink:href="fdxf-20260531.xsd#fdxf_PaymentIntervalThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7577-a1cc-8b2613f42bae" xlink:to="loc_fdxf_PaymentIntervalThreeMember_019f8f07-f6f1-7230-89d1-c55ec40da4ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentIntervalFourMember_019f8f07-f6f1-75f1-8271-9ac37389780b" xlink:href="fdxf-20260531.xsd#fdxf_PaymentIntervalFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerDurationDomain_019f8f07-f6f1-7577-a1cc-8b2613f42bae" xlink:to="loc_fdxf_PaymentIntervalFourMember_019f8f07-f6f1-75f1-8271-9ac37389780b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019f8f09-8d8f-7ee6-95a9-0e3e88fcd410" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019f8f07-f6f1-7a71-8849-b363e56318b3" xlink:to="loc_srt_StatementGeographicalAxis_019f8f09-8d8f-7ee6-95a9-0e3e88fcd410" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f8f09-8d8f-7ee6-95a9-0e3e88fcd410_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019f8f09-8d8f-7ee6-95a9-0e3e88fcd410" xlink:to="loc_srt_SegmentGeographicalDomain_019f8f09-8d8f-7ee6-95a9-0e3e88fcd410_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f8f09-8d8f-7570-b791-a7b8f4a347ea" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019f8f09-8d8f-7ee6-95a9-0e3e88fcd410" xlink:to="loc_srt_SegmentGeographicalDomain_019f8f09-8d8f-7570-b791-a7b8f4a347ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019f8f09-8d8f-7d31-a1d6-9ca52098757c" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f8f09-8d8f-7570-b791-a7b8f4a347ea" xlink:to="loc_country_US_019f8f09-8d8f-7d31-a1d6-9ca52098757c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019f8f09-8d8f-7a97-bbd4-ed864d23ff51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f8f09-8d8f-7570-b791-a7b8f4a347ea" xlink:to="loc_us-gaap_NonUsMember_019f8f09-8d8f-7a97-bbd4-ed864d23ff51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetGross_019f8f07-f6f1-7b34-9466-591e29ecd797" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_ContractWithCustomerAssetGross_019f8f07-f6f1-7b34-9466-591e29ecd797" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_019f8f07-f6f1-742d-ac2b-543af13d6b04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_ContractWithCustomerAssetNet_019f8f07-f6f1-742d-ac2b-543af13d6b04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_ContractWithCustomerPeriodicPaymentTerm_019f8f07-f6f1-74ab-b616-7321360e6abe" xlink:href="fdxf-20260531.xsd#fdxf_ContractWithCustomerPeriodicPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_fdxf_ContractWithCustomerPeriodicPaymentTerm_019f8f07-f6f1-74ab-b616-7321360e6abe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_RevenueAdjustmentsPriorToTerminationOfFactoringAgreement_019fc946-a36d-75ba-a706-870355273e8f" xlink:href="fdxf-20260531.xsd#fdxf_RevenueAdjustmentsPriorToTerminationOfFactoringAgreement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_fdxf_RevenueAdjustmentsPriorToTerminationOfFactoringAgreement_019fc946-a36d-75ba-a706-870355273e8f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_019f8f09-2b09-7a39-86e8-8d5d8d87427b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_PaymentsOfDividends_019f8f09-2b09-7a39-86e8-8d5d8d87427b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentsToParentFinancingActivities_019f8f09-2b09-7599-84a3-9600c7a403f7" xlink:href="fdxf-20260531.xsd#fdxf_PaymentsToParentFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_fdxf_PaymentsToParentFinancingActivities_019f8f09-2b09-7599-84a3-9600c7a403f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_019fb8d2-d5a5-754b-aab8-f7a72947e2bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_019fb8d2-d5a5-754b-aab8-f7a72947e2bf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019fab18-04ca-7ab4-a944-18fdb72274bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_Depreciation_019fab18-04ca-7ab4-a944-18fdb72274bb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_019f8f09-8d8f-70ea-ac10-faa2737a33a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_019f8f09-8d8f-70ea-ac10-faa2737a33a8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_019f8f09-8d8f-7e07-9a22-5fcceee9a907" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_AssetsNoncurrent_019f8f09-8d8f-7e07-9a22-5fcceee9a907" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019f8f0e-7a4a-7433-91f3-80d557562481" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019f8f0e-7a4a-7433-91f3-80d557562481" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019f8f0b-fcce-7c8c-a04e-e63aa1cf57e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_Goodwill_019f8f0b-fcce-7c8c-a04e-e63aa1cf57e4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019f8f0b-fcce-7049-984c-49a5d212f4fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019f8f0b-fcce-7049-984c-49a5d212f4fd" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019f8f09-d578-74a5-9e64-cee24f071142" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019f8f09-d578-74a5-9e64-cee24f071142" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_019f8f09-d578-7ba4-96dd-913d896f6805" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_019f8f09-d578-7ba4-96dd-913d896f6805" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SelfInsuranceReserve_019f8f0a-24a5-7d84-a6cd-39b768632e78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SelfInsuranceReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_SelfInsuranceReserve_019f8f0a-24a5-7d84-a6cd-39b768632e78" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019f8f0a-5bfc-7475-bccc-7156cf3b23b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019f8f0a-5bfc-7475-bccc-7156cf3b23b6" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019f8f0a-5bfc-7ae4-a24f-0b5761873ede" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019f8f0a-5bfc-7ae4-a24f-0b5761873ede" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019f8f0a-5bfc-7197-8d77-a97e377b0c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019f8f0a-5bfc-7197-8d77-a97e377b0c2c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019f8f0a-5bfc-7f25-b805-300094749f44" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019f8f07-f6f1-760d-af56-d74396d38e9a" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019f8f0a-5bfc-7f25-b805-300094749f44" xlink:type="arc" order="19"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofChargesinAllowanceforCreditLossesDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofChargesinAllowanceforCreditLossesDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofChargesinAllowanceforCreditLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_019fb37d-4fb1-719a-9c72-7a52bd418fc0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_019fb37d-4fb1-7431-92f9-0f7162b6f8f3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_019fb37d-4fb1-719a-9c72-7a52bd418fc0" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_019fb37d-4fb1-7431-92f9-0f7162b6f8f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019fb37d-4fb1-7332-b6c8-4db008d1793f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_019fb37d-4fb1-7431-92f9-0f7162b6f8f3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019fb37d-4fb1-7332-b6c8-4db008d1793f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_019fb37d-4fb1-7332-b6c8-4db008d1793f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019fb37d-4fb1-7332-b6c8-4db008d1793f" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_019fb37d-4fb1-7332-b6c8-4db008d1793f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_019fb37d-4fb1-7213-9b51-ffd274eb47ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019fb37d-4fb1-7332-b6c8-4db008d1793f" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_019fb37d-4fb1-7213-9b51-ffd274eb47ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForCreditLossMember_019fb37d-4fb1-71a7-ab28-190bf8ef3222" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForCreditLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_019fb37d-4fb1-7213-9b51-ffd274eb47ca" xlink:to="loc_us-gaap_AllowanceForCreditLossMember_019fb37d-4fb1-71a7-ab28-190bf8ef3222" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_AllowanceForRevenueAdjustmentsMember_019fb37d-4fb1-7655-bc48-c0ee0dd5f300" xlink:href="fdxf-20260531.xsd#fdxf_AllowanceForRevenueAdjustmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_019fb37d-4fb1-7213-9b51-ffd274eb47ca" xlink:to="loc_fdxf_AllowanceForRevenueAdjustmentsMember_019fb37d-4fb1-7655-bc48-c0ee0dd5f300" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_019fb37d-4fb1-719a-9c72-7a52bd418fc0" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_019fb37d-4fb1-7181-98b8-c26856be64f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_019fb37d-4fb1-7181-98b8-c26856be64f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_SECSchedule1209ValuationAllowancesAndReservesRepurchasedReceivables_019fb37d-4fb1-77a4-83c4-c394721e9e2a" xlink:href="fdxf-20260531.xsd#fdxf_SECSchedule1209ValuationAllowancesAndReservesRepurchasedReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:to="loc_fdxf_SECSchedule1209ValuationAllowancesAndReservesRepurchasedReceivables_019fb37d-4fb1-77a4-83c4-c394721e9e2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_019fb37d-4fb1-7161-bb5c-983e172318e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_019fb37d-4fb1-7161-bb5c-983e172318e1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_019fb37d-4fb1-744a-8fdf-2458bbd67ac0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_019fb37d-4fb1-744a-8fdf-2458bbd67ac0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesRecoveries_019fbaa8-c0d0-7409-9ceb-f8a00ef4cac8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_019fb37d-4fb1-7a12-be23-6c063b0d8303" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesRecoveries_019fbaa8-c0d0-7409-9ceb-f8a00ef4cac8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_019fb37d-4fb1-7cb9-9666-fb8531b3c9e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyandEquipmentDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019ed9c6-121d-7edb-8450-811919278840" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019ed9c6-121d-743b-a00f-9157a08156eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019ed9c6-121d-7edb-8450-811919278840" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019ed9c6-121d-743b-a00f-9157a08156eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019ed9c6-121d-756a-afa1-8539c1924aa9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019ed9c6-121d-743b-a00f-9157a08156eb" xlink:to="loc_srt_RangeAxis_019ed9c6-121d-756a-afa1-8539c1924aa9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019ed9c6-121d-756a-afa1-8539c1924aa9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019ed9c6-121d-756a-afa1-8539c1924aa9" xlink:to="loc_srt_RangeMember_019ed9c6-121d-756a-afa1-8539c1924aa9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019ed9c6-121d-73d7-affe-f282e72e5f5a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019ed9c6-121d-756a-afa1-8539c1924aa9" xlink:to="loc_srt_RangeMember_019ed9c6-121d-73d7-affe-f282e72e5f5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019ed9c6-121d-711d-9bfc-6d8c3755a2f9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019ed9c6-121d-73d7-affe-f282e72e5f5a" xlink:to="loc_srt_MinimumMember_019ed9c6-121d-711d-9bfc-6d8c3755a2f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019ed9c6-121d-7f60-a647-90c3ae4567ca" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019ed9c6-121d-73d7-affe-f282e72e5f5a" xlink:to="loc_srt_MaximumMember_019ed9c6-121d-7f60-a647-90c3ae4567ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019ed9c6-121d-79a5-ad6a-e3a450f7e0ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019ed9c6-121d-743b-a00f-9157a08156eb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019ed9c6-121d-79a5-ad6a-e3a450f7e0ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-79a5-ad6a-e3a450f7e0ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019ed9c6-121d-79a5-ad6a-e3a450f7e0ef" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-79a5-ad6a-e3a450f7e0ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-7f77-ad99-13ff39c1e4dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019ed9c6-121d-79a5-ad6a-e3a450f7e0ef" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-7f77-ad99-13ff39c1e4dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_VehiclesAndTrailersMember_019ed9c6-121d-7717-9c7c-32670bc140da" xlink:href="fdxf-20260531.xsd#fdxf_VehiclesAndTrailersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-7f77-ad99-13ff39c1e4dd" xlink:to="loc_fdxf_VehiclesAndTrailersMember_019ed9c6-121d-7717-9c7c-32670bc140da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FacilitiesAndOtherPropertyMember_019ed9c6-121d-7d44-90dd-51a21ce1e143" xlink:href="fdxf-20260531.xsd#fdxf_FacilitiesAndOtherPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-7f77-ad99-13ff39c1e4dd" xlink:to="loc_fdxf_FacilitiesAndOtherPropertyMember_019ed9c6-121d-7d44-90dd-51a21ce1e143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_GroundSupportAndDockEquipmentMember_019ed9c6-121d-73c5-910c-4b64506ac0e8" xlink:href="fdxf-20260531.xsd#fdxf_GroundSupportAndDockEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-7f77-ad99-13ff39c1e4dd" xlink:to="loc_fdxf_GroundSupportAndDockEquipmentMember_019ed9c6-121d-73c5-910c-4b64506ac0e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_InformationTechnologyMember_019ed9c6-121d-75e3-ad47-e75b2f6dd90f" xlink:href="fdxf-20260531.xsd#fdxf_InformationTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019ed9c6-121d-7f77-ad99-13ff39c1e4dd" xlink:to="loc_fdxf_InformationTechnologyMember_019ed9c6-121d-75e3-ad47-e75b2f6dd90f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019ed9c6-121d-7729-9a9a-0b810d6110f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019ed9c6-121d-7edb-8450-811919278840" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019ed9c6-121d-7729-9a9a-0b810d6110f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019ed9c6-121d-736a-963b-0b54d8281944" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019ed9c6-121d-7edb-8450-811919278840" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_019ed9c6-121d-736a-963b-0b54d8281944" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/LONGTERMDEBTScheduleofLongtermDebtDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#LONGTERMDEBTScheduleofLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/LONGTERMDEBTScheduleofLongtermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019faa23-94e4-7733-bb3e-1d37c7a40474" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_DebtInstrumentTable_019faa23-94e4-7733-bb3e-1d37c7a40474" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019faa23-94e4-7baa-b3fc-87b49d2dac04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019faa23-94e4-7733-bb3e-1d37c7a40474" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019faa23-94e4-7baa-b3fc-87b49d2dac04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019faa23-94e4-7baa-b3fc-87b49d2dac04_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019faa23-94e4-7baa-b3fc-87b49d2dac04" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019faa23-94e4-7baa-b3fc-87b49d2dac04_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019faa23-94e4-79b0-8d17-0c1e45aaf46b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019faa23-94e4-7baa-b3fc-87b49d2dac04" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019faa23-94e4-79b0-8d17-0c1e45aaf46b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019fc8c4-9d8e-7a8e-b20a-b7b1b34935da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019faa23-94e4-79b0-8d17-0c1e45aaf46b" xlink:to="loc_us-gaap_LineOfCreditMember_019fc8c4-9d8e-7a8e-b20a-b7b1b34935da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019faa28-a540-7c27-a72c-4beb8df524f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019faa23-94e4-79b0-8d17-0c1e45aaf46b" xlink:to="loc_us-gaap_SeniorNotesMember_019faa28-a540-7c27-a72c-4beb8df524f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019faa23-94e4-7968-a38e-4330dcecdaf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019faa23-94e4-7733-bb3e-1d37c7a40474" xlink:to="loc_us-gaap_DebtInstrumentAxis_019faa23-94e4-7968-a38e-4330dcecdaf8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-7968-a38e-4330dcecdaf8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019faa23-94e4-7968-a38e-4330dcecdaf8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-7968-a38e-4330dcecdaf8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019faa23-94e4-7968-a38e-4330dcecdaf8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DelayedDrawTermLoanAgreementMember_019fc88c-b981-7c71-a9a7-ecaac0343e81" xlink:href="fdxf-20260531.xsd#fdxf_DelayedDrawTermLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:to="loc_fdxf_DelayedDrawTermLoanAgreementMember_019fc88c-b981-7c71-a9a7-ecaac0343e81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FourPointThreeZeroPercentSeniorUnsecuredNotesDueTwentyTwentyNineMember_019faa29-b203-71a8-b6b6-4f1b0fae6599" xlink:href="fdxf-20260531.xsd#fdxf_FourPointThreeZeroPercentSeniorUnsecuredNotesDueTwentyTwentyNineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:to="loc_fdxf_FourPointThreeZeroPercentSeniorUnsecuredNotesDueTwentyTwentyNineMember_019faa29-b203-71a8-b6b6-4f1b0fae6599" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FourPointSixFivePercentSeniorUnsecuredNotesDueTwentyThirtyOneMember_019faa2a-21a4-75f7-98b5-2bb5ad7953f0" xlink:href="fdxf-20260531.xsd#fdxf_FourPointSixFivePercentSeniorUnsecuredNotesDueTwentyThirtyOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:to="loc_fdxf_FourPointSixFivePercentSeniorUnsecuredNotesDueTwentyThirtyOneMember_019faa2a-21a4-75f7-98b5-2bb5ad7953f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FourPointNineFivePercentSeniorUnsecuredNotesDueTwentyThirtyThreeMember_019faa2a-83f4-729c-9ce3-03e25732b3e6" xlink:href="fdxf-20260531.xsd#fdxf_FourPointNineFivePercentSeniorUnsecuredNotesDueTwentyThirtyThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:to="loc_fdxf_FourPointNineFivePercentSeniorUnsecuredNotesDueTwentyThirtyThreeMember_019faa2a-83f4-729c-9ce3-03e25732b3e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FivePointTwoFivePercentSeniorUnsecuredNotesDueTwentyThirtySixMember_019faa2a-e338-78aa-ab40-ae98840f9fee" xlink:href="fdxf-20260531.xsd#fdxf_FivePointTwoFivePercentSeniorUnsecuredNotesDueTwentyThirtySixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019faa23-94e4-71ed-b650-790d36f48468" xlink:to="loc_fdxf_FivePointTwoFivePercentSeniorUnsecuredNotesDueTwentyThirtySixMember_019faa2a-e338-78aa-ab40-ae98840f9fee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019faa23-94e4-70c4-9aca-76b81df782cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019faa23-94e4-70c4-9aca-76b81df782cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019faa25-da57-7b47-8cf5-e6fa42af7607" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_LongTermDebt_019faa25-da57-7b47-8cf5-e6fa42af7607" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_019faa26-2719-7147-bd6d-aa3301811d53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_FinanceLeaseLiability_019faa26-2719-7147-bd6d-aa3301811d53" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019faa27-6d4c-7506-94d9-7c7c6041c510" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019faa27-6d4c-7506-94d9-7c7c6041c510" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019faa27-10b8-7478-93e9-44bcc2b60fb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019faa27-10b8-7478-93e9-44bcc2b60fb3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019faa38-dcbb-75ae-a170-c26535163247" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019faa38-dcbb-75ae-a170-c26535163247" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList_019fb8b1-3b8a-7f42-bb7e-eea48eb4701e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019faa23-94e4-719b-b1ac-eaf437954b9c" xlink:to="loc_us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList_019fb8b1-3b8a-7f42-bb7e-eea48eb4701e" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/LONGTERMDEBTNarrativeDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#LONGTERMDEBTNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/LONGTERMDEBTNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f41c0-3179-7ac4-a904-efb1fe5c61f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f41c0-3179-7ac4-a904-efb1fe5c61f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7ac4-a904-efb1fe5c61f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f41c0-3179-7ac4-a904-efb1fe5c61f8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7ac4-a904-efb1fe5c61f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7d46-9c0b-9d56ded858ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f41c0-3179-7ac4-a904-efb1fe5c61f8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7d46-9c0b-9d56ded858ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_SeniorUnsecuredNotesMember_019f42a3-9254-73a9-a2d7-0ffe81218014" xlink:href="fdxf-20260531.xsd#fdxf_SeniorUnsecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7d46-9c0b-9d56ded858ff" xlink:to="loc_fdxf_SeniorUnsecuredNotesMember_019f42a3-9254-73a9-a2d7-0ffe81218014" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DelayedDrawTermLoanAgreementMember_019faa13-f1d4-7297-b40d-fded894b9cb1" xlink:href="fdxf-20260531.xsd#fdxf_DelayedDrawTermLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7d46-9c0b-9d56ded858ff" xlink:to="loc_fdxf_DelayedDrawTermLoanAgreementMember_019faa13-f1d4-7297-b40d-fded894b9cb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FedExFreightRevolvingCreditFacilityMember_019f42a7-85ff-79b5-9a4f-499e8d8b4052" xlink:href="fdxf-20260531.xsd#fdxf_FedExFreightRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f41c0-3179-7d46-9c0b-9d56ded858ff" xlink:to="loc_fdxf_FedExFreightRevolvingCreditFacilityMember_019f42a7-85ff-79b5-9a4f-499e8d8b4052" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019f41c0-3179-74d1-a62e-2bf45c36dd67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019f41c0-3179-74d1-a62e-2bf45c36dd67" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f41c0-3179-74d1-a62e-2bf45c36dd67_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f41c0-3179-74d1-a62e-2bf45c36dd67" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f41c0-3179-74d1-a62e-2bf45c36dd67_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f41c0-3179-7745-a41f-64070c5ac8e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f41c0-3179-74d1-a62e-2bf45c36dd67" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f41c0-3179-7745-a41f-64070c5ac8e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019f41c0-3179-7649-88a4-b3104395d709" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f41c0-3179-7745-a41f-64070c5ac8e8" xlink:to="loc_us-gaap_SeniorNotesMember_019f41c0-3179-7649-88a4-b3104395d709" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019f41c0-589a-7ac1-8ab5-98daa2d6bd02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f41c0-3179-7745-a41f-64070c5ac8e8" xlink:to="loc_us-gaap_LineOfCreditMember_019f41c0-589a-7ac1-8ab5-98daa2d6bd02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019f41c0-589a-74c1-9c3b-93153018dae8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:to="loc_us-gaap_CreditFacilityAxis_019f41c0-589a-74c1-9c3b-93153018dae8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019f41c0-589a-74c1-9c3b-93153018dae8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019f41c0-589a-74c1-9c3b-93153018dae8" xlink:to="loc_us-gaap_CreditFacilityDomain_019f41c0-589a-74c1-9c3b-93153018dae8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019f41c0-589a-70ee-a91b-216a0e64ebb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019f41c0-589a-74c1-9c3b-93153018dae8" xlink:to="loc_us-gaap_CreditFacilityDomain_019f41c0-589a-70ee-a91b-216a0e64ebb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019f41c0-589a-7dfe-bfff-97b1d69153e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019f41c0-589a-70ee-a91b-216a0e64ebb4" xlink:to="loc_us-gaap_LetterOfCreditMember_019f41c0-589a-7dfe-bfff-97b1d69153e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DelayedDrawTermLoanMember_019fb912-abd6-7e51-b279-3da91ec67a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DelayedDrawTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019f41c0-589a-70ee-a91b-216a0e64ebb4" xlink:to="loc_us-gaap_DelayedDrawTermLoanMember_019fb912-abd6-7e51-b279-3da91ec67a4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f41c0-589a-796c-b195-b3a209a27a41" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:to="loc_srt_RangeAxis_019f41c0-589a-796c-b195-b3a209a27a41" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f41c0-589a-796c-b195-b3a209a27a41_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f41c0-589a-796c-b195-b3a209a27a41" xlink:to="loc_srt_RangeMember_019f41c0-589a-796c-b195-b3a209a27a41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f41c0-589a-7394-b87a-93e0175da2c3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f41c0-589a-796c-b195-b3a209a27a41" xlink:to="loc_srt_RangeMember_019f41c0-589a-7394-b87a-93e0175da2c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019f41c0-589a-71ea-8ba5-38723f8e43dd" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f41c0-589a-7394-b87a-93e0175da2c3" xlink:to="loc_srt_MinimumMember_019f41c0-589a-71ea-8ba5-38723f8e43dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019f41c0-589a-75c8-8e5d-797dda47d782" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f41c0-589a-7394-b87a-93e0175da2c3" xlink:to="loc_srt_MaximumMember_019f41c0-589a-75c8-8e5d-797dda47d782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019f42c8-eac9-726b-bf17-edaafbd44991" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:to="loc_us-gaap_VariableRateAxis_019f42c8-eac9-726b-bf17-edaafbd44991" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019f42c8-eac9-726b-bf17-edaafbd44991_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019f42c8-eac9-726b-bf17-edaafbd44991" xlink:to="loc_us-gaap_VariableRateDomain_019f42c8-eac9-726b-bf17-edaafbd44991_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019f42c8-eac9-75d9-8b21-b6e960773ced" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019f42c8-eac9-726b-bf17-edaafbd44991" xlink:to="loc_us-gaap_VariableRateDomain_019f42c8-eac9-75d9-8b21-b6e960773ced" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019f42c9-0cad-79d7-88e2-ab1368b6c2a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019f42c8-eac9-75d9-8b21-b6e960773ced" xlink:to="loc_us-gaap_BaseRateMember_019f42c9-0cad-79d7-88e2-ab1368b6c2a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_BenchmarkRateBorrowingsMember_019f42c9-798c-7f03-88b1-64276ca9a941" xlink:href="fdxf-20260531.xsd#fdxf_BenchmarkRateBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019f42c8-eac9-75d9-8b21-b6e960773ced" xlink:to="loc_fdxf_BenchmarkRateBorrowingsMember_019f42c9-798c-7f03-88b1-64276ca9a941" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantPeriodAxis_019f436f-a865-70c6-ab60-c4c5dcce5b4d" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019eda40-d0e6-706d-9e93-b085846fc893" xlink:to="loc_fdxf_DebtInstrumentCovenantPeriodAxis_019f436f-a865-70c6-ab60-c4c5dcce5b4d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-70c6-ab60-c4c5dcce5b4d_default" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fdxf_DebtInstrumentCovenantPeriodAxis_019f436f-a865-70c6-ab60-c4c5dcce5b4d" xlink:to="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-70c6-ab60-c4c5dcce5b4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-726d-a941-ae22921d181c" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fdxf_DebtInstrumentCovenantPeriodAxis_019f436f-a865-70c6-ab60-c4c5dcce5b4d" xlink:to="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-726d-a941-ae22921d181c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantPeriodOneMember_019f437d-1d8f-75e2-a159-c376911981e8" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-726d-a941-ae22921d181c" xlink:to="loc_fdxf_DebtInstrumentCovenantPeriodOneMember_019f437d-1d8f-75e2-a159-c376911981e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantPeriodTwoMember_019f437d-609b-75a0-9ad2-7d7250ec16cf" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-726d-a941-ae22921d181c" xlink:to="loc_fdxf_DebtInstrumentCovenantPeriodTwoMember_019f437d-609b-75a0-9ad2-7d7250ec16cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantPeriodThreeMember_019f4389-c02f-7ea4-8e79-f3e5f901429c" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantPeriodThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fdxf_DebtInstrumentCovenantPeriodDomain_019f436f-a865-726d-a941-ae22921d181c" xlink:to="loc_fdxf_DebtInstrumentCovenantPeriodThreeMember_019f4389-c02f-7ea4-8e79-f3e5f901429c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019f41c0-3179-755c-b707-666a2e9b5f40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019f41c0-3179-755c-b707-666a2e9b5f40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_019fbaab-a395-75b2-9117-8b7b8815c3c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_019fbaab-a395-75b2-9117-8b7b8815c3c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentsToParentFinancingActivities_019f94be-ff20-79ee-b66b-f425a0e1c642" xlink:href="fdxf-20260531.xsd#fdxf_PaymentsToParentFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_fdxf_PaymentsToParentFinancingActivities_019f94be-ff20-79ee-b66b-f425a0e1c642" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019f41c0-589a-7c7a-bf6a-f19d391d5105" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_LongTermDebt_019f41c0-589a-7c7a-bf6a-f19d391d5105" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019f41c0-589a-768e-a671-8a6e65a46fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_LongTermDebtFairValue_019f41c0-589a-768e-a671-8a6e65a46fd0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_019f41c0-589a-7ef8-8e1d-c863471c40a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_019f41c0-589a-7ef8-8e1d-c863471c40a9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019f41c0-589a-7195-b17e-081b3fb013cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_DebtInstrumentTerm_019f41c0-589a-7195-b17e-081b3fb013cd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019f41c0-589a-7201-bf5f-655bdb43e70f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019f41c0-589a-7201-bf5f-655bdb43e70f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019f41c0-589a-7f69-a87a-fea8e2cec401" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019f41c0-589a-7f69-a87a-fea8e2cec401" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019faa1d-ef25-7136-9f4a-cc5781c74ef8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019faa1d-ef25-7136-9f4a-cc5781c74ef8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantMeasurementPeriod_019f41c0-8038-7722-b36b-a8917d504822" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantMeasurementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_fdxf_DebtInstrumentCovenantMeasurementPeriod_019f41c0-8038-7722-b36b-a8917d504822" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantLeverageRatio_019f41c0-8038-7440-9d38-8d5eed622f73" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_fdxf_DebtInstrumentCovenantLeverageRatio_019f41c0-8038-7440-9d38-8d5eed622f73" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantAcquisitionAggregateCashConsideration_019f41c0-8038-7f2f-9e51-baae6da96f83" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantAcquisitionAggregateCashConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_fdxf_DebtInstrumentCovenantAcquisitionAggregateCashConsideration_019f41c0-8038-7f2f-9e51-baae6da96f83" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantConsecutiveQuartersWithNoElections_019fb94b-3c97-7743-97c9-d33c05deed2e" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantConsecutiveQuartersWithNoElections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_fdxf_DebtInstrumentCovenantConsecutiveQuartersWithNoElections_019fb94b-3c97-7743-97c9-d33c05deed2e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_DebtInstrumentCovenantQuartersFollowingConsummationOfAcquisition_019f4391-3f60-71b6-a7a8-7b242af89cf0" xlink:href="fdxf-20260531.xsd#fdxf_DebtInstrumentCovenantQuartersFollowingConsummationOfAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019eda40-d0e6-71b1-991e-7db42a354316" xlink:to="loc_fdxf_DebtInstrumentCovenantQuartersFollowingConsummationOfAcquisition_019f4391-3f60-71b6-a7a8-7b242af89cf0" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/INCOMETAXESIncomeTaxPaidDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#INCOMETAXESIncomeTaxPaidDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/INCOMETAXESIncomeTaxPaidDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_019fb8df-55ba-7761-b1d2-71ecd387d9a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxContingencyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_019fb8df-55ba-792e-ad47-c66b908cea29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxContingencyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_019fb8df-55ba-7761-b1d2-71ecd387d9a0" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_019fb8df-55ba-792e-ad47-c66b908cea29" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019fb8df-55ba-7233-88d4-71289edcccba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_019fb8df-55ba-792e-ad47-c66b908cea29" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019fb8df-55ba-7233-88d4-71289edcccba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019fb8df-55ba-7233-88d4-71289edcccba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019fb8df-55ba-7233-88d4-71289edcccba" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019fb8df-55ba-7233-88d4-71289edcccba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019fb8df-55ba-7a16-bfe1-777fbeeaa495" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019fb8df-55ba-7233-88d4-71289edcccba" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019fb8df-55ba-7a16-bfe1-777fbeeaa495" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_019fb8e5-7181-75fb-8acd-58b263db9ac1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019fb8df-55ba-7a16-bfe1-777fbeeaa495" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_019fb8e5-7181-75fb-8acd-58b263db9ac1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_PA_019fb8df-e1fe-7482-bfb5-9f2ba75b5cf8" xlink:href="https://xbrl.sec.gov/stpr/2026/stpr-2026.xsd#stpr_PA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StateAndLocalJurisdictionMember_019fb8e5-7181-75fb-8acd-58b263db9ac1" xlink:to="loc_stpr_PA_019fb8df-e1fe-7482-bfb5-9f2ba75b5cf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalTaxJurisdictionOtherMember_019fb8e0-ccef-7c20-87d2-43685d965b20" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StateAndLocalTaxJurisdictionOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StateAndLocalJurisdictionMember_019fb8e5-7181-75fb-8acd-58b263db9ac1" xlink:to="loc_us-gaap_StateAndLocalTaxJurisdictionOtherMember_019fb8e0-ccef-7c20-87d2-43685d965b20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_019fb8e2-e5fc-73da-80ac-c354b722cc3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019fb8df-55ba-7a16-bfe1-777fbeeaa495" xlink:to="loc_us-gaap_ForeignCountryMember_019fb8e2-e5fc-73da-80ac-c354b722cc3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_019fb8e3-464c-73b8-9a3d-821f4a74a919" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019fb8e2-e5fc-73da-80ac-c354b722cc3c" xlink:to="loc_country_CA_019fb8e3-464c-73b8-9a3d-821f4a74a919" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_MX_019fb8e3-6f97-7e70-af53-b17b549d0fd4" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_MX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019fb8e2-e5fc-73da-80ac-c354b722cc3c" xlink:to="loc_country_MX_019fb8e3-6f97-7e70-af53-b17b549d0fd4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignTaxJurisdictionOtherMember_019fb8e3-ae5b-7e95-83bc-cd452e07c5f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignTaxJurisdictionOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019fb8e2-e5fc-73da-80ac-c354b722cc3c" xlink:to="loc_us-gaap_ForeignTaxJurisdictionOtherMember_019fb8e3-ae5b-7e95-83bc-cd452e07c5f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019eef6a-18f7-7182-9f38-87ef6d23dc6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_019fb8df-55ba-7761-b1d2-71ecd387d9a0" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019eef6a-18f7-7182-9f38-87ef6d23dc6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019eef6a-18f7-7751-a7cb-2a05b1178b7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_019fb8df-55ba-7761-b1d2-71ecd387d9a0" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019eef6a-18f7-7751-a7cb-2a05b1178b7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019eef6a-18f7-75fc-be39-6393813f4faa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidForeignAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_019fb8df-55ba-7761-b1d2-71ecd387d9a0" xlink:to="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019eef6a-18f7-75fc-be39-6393813f4faa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019eef6a-18f7-7c13-9993-84918cb8b0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_019fb8df-55ba-7761-b1d2-71ecd387d9a0" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019eef6a-18f7-7c13-9993-84918cb8b0d0" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/DISAGGREGATEDREVENUEDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#DISAGGREGATEDREVENUEDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/DISAGGREGATEDREVENUEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019ed947-98f8-735e-9a3d-85e5102891e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019ed946-ca23-7288-8976-08c27b7f06e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019ed947-98f8-735e-9a3d-85e5102891e6" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019ed946-ca23-7288-8976-08c27b7f06e9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019ed948-ccef-73e6-b385-97c10c8d5433" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019ed946-ca23-7288-8976-08c27b7f06e9" xlink:to="loc_srt_ProductOrServiceAxis_019ed948-ccef-73e6-b385-97c10c8d5433" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ed948-ccef-73e6-b385-97c10c8d5433_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019ed948-ccef-73e6-b385-97c10c8d5433" xlink:to="loc_srt_ProductsAndServicesDomain_019ed948-ccef-73e6-b385-97c10c8d5433_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019ed948-ccef-7cd6-b131-fa9997e3f6b9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019ed948-ccef-73e6-b385-97c10c8d5433" xlink:to="loc_srt_ProductsAndServicesDomain_019ed948-ccef-7cd6-b131-fa9997e3f6b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PriorityMember_019ed949-2a34-7923-8518-d48282d984d1" xlink:href="fdxf-20260531.xsd#fdxf_PriorityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ed948-ccef-7cd6-b131-fa9997e3f6b9" xlink:to="loc_fdxf_PriorityMember_019ed949-2a34-7923-8518-d48282d984d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_EconomyMember_019ed949-668f-7dbb-b1ce-0b066ca70227" xlink:href="fdxf-20260531.xsd#fdxf_EconomyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ed948-ccef-7cd6-b131-fa9997e3f6b9" xlink:to="loc_fdxf_EconomyMember_019ed949-668f-7dbb-b1ce-0b066ca70227" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_OtherMember_019ed949-ad1d-7f1f-8806-b45b21a06c76" xlink:href="fdxf-20260531.xsd#fdxf_OtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019ed948-ccef-7cd6-b131-fa9997e3f6b9" xlink:to="loc_fdxf_OtherMember_019ed949-ad1d-7f1f-8806-b45b21a06c76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019ed94a-ef18-7a49-b036-2f128f2f9b0f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019ed946-ca23-7288-8976-08c27b7f06e9" xlink:to="loc_srt_StatementGeographicalAxis_019ed94a-ef18-7a49-b036-2f128f2f9b0f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019ed94a-ef18-7a49-b036-2f128f2f9b0f_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019ed94a-ef18-7a49-b036-2f128f2f9b0f" xlink:to="loc_srt_SegmentGeographicalDomain_019ed94a-ef18-7a49-b036-2f128f2f9b0f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019ed94a-ef18-743a-be51-927497a906c7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019ed94a-ef18-7a49-b036-2f128f2f9b0f" xlink:to="loc_srt_SegmentGeographicalDomain_019ed94a-ef18-743a-be51-927497a906c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019ed94b-19dd-72fc-93f1-93eb9462358f" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019ed94a-ef18-743a-be51-927497a906c7" xlink:to="loc_country_US_019ed94b-19dd-72fc-93f1-93eb9462358f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019ed94b-4a6a-7386-b9be-9c3e63f0a32b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019ed94a-ef18-743a-be51-927497a906c7" xlink:to="loc_us-gaap_NonUsMember_019ed94b-4a6a-7386-b9be-9c3e63f0a32b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ed947-98f8-775f-8a3a-7ad01932ac5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019ed947-98f8-735e-9a3d-85e5102891e6" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019ed947-98f8-775f-8a3a-7ad01932ac5e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/RELATEDPARTYTRANSACTIONSNarrativeDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#RELATEDPARTYTRANSACTIONSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/RELATEDPARTYTRANSACTIONSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed9ad-3f0e-7637-9ce4-586e3c66de27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed9ad-3f0e-7637-9ce4-586e3c66de27" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd6a-8e3f-7ad0-8c38-968e62860130" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed9ad-3f0e-7637-9ce4-586e3c66de27" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd6a-8e3f-7ad0-8c38-968e62860130" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019efd6a-8e3f-7ad0-8c38-968e62860130_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd6a-8e3f-7ad0-8c38-968e62860130" xlink:to="loc_us-gaap_RelatedPartyDomain_019efd6a-8e3f-7ad0-8c38-968e62860130_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019efd6a-8e3f-7b36-81c4-4c7be65e4c42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd6a-8e3f-7ad0-8c38-968e62860130" xlink:to="loc_us-gaap_RelatedPartyDomain_019efd6a-8e3f-7b36-81c4-4c7be65e4c42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019efd6a-8e3f-713f-81f6-98af88eba42b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019efd6a-8e3f-7b36-81c4-4c7be65e4c42" xlink:to="loc_us-gaap_RelatedPartyMember_019efd6a-8e3f-713f-81f6-98af88eba42b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019efd6a-b462-7c91-b36e-6e441314f35e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed9ad-3f0e-7637-9ce4-586e3c66de27" xlink:to="loc_dei_LegalEntityAxis_019efd6a-b462-7c91-b36e-6e441314f35e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019efd6a-b462-7c91-b36e-6e441314f35e_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019efd6a-b462-7c91-b36e-6e441314f35e" xlink:to="loc_dei_EntityDomain_019efd6a-b462-7c91-b36e-6e441314f35e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019efd6a-b462-7469-bbb4-0242bf77403b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019efd6a-b462-7c91-b36e-6e441314f35e" xlink:to="loc_dei_EntityDomain_019efd6a-b462-7469-bbb4-0242bf77403b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_FedExCorporationMember_019efd6a-b462-7cb5-b58c-83cbc6efbd65" xlink:href="fdxf-20260531.xsd#fdxf_FedExCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019efd6a-b462-7469-bbb4-0242bf77403b" xlink:to="loc_fdxf_FedExCorporationMember_019efd6a-b462-7cb5-b58c-83cbc6efbd65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019efd6a-8e3f-7282-a56d-e8632e206a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019efd6a-8e3f-7282-a56d-e8632e206a5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PurchasedTransportationCostsDirectOperationalShipping_019fb38d-addc-7776-9ad0-184025fd6c67" xlink:href="fdxf-20260531.xsd#fdxf_PurchasedTransportationCostsDirectOperationalShipping"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_fdxf_PurchasedTransportationCostsDirectOperationalShipping_019fb38d-addc-7776-9ad0-184025fd6c67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_SeparationTransactionCosts_019efd6a-b462-7a70-9551-5b5f823e81d3" xlink:href="fdxf-20260531.xsd#fdxf_SeparationTransactionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_fdxf_SeparationTransactionCosts_019efd6a-b462-7a70-9551-5b5f823e81d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019efd6a-d02f-79bb-a393-a026ffabe090" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019efd6a-d02f-79bb-a393-a026ffabe090" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableSale_019efd6a-e661-7867-9d0e-b09b6abba0da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_us-gaap_AccountsReceivableSale_019efd6a-e661-7867-9d0e-b09b6abba0da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_AccountsReceivableSaleFinanceCharge_019f9517-d6d9-7ca0-b322-af8515effe46" xlink:href="fdxf-20260531.xsd#fdxf_AccountsReceivableSaleFinanceCharge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_fdxf_AccountsReceivableSaleFinanceCharge_019f9517-d6d9-7ca0-b322-af8515effe46" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivablePurchase_019efd6a-e661-79c7-b084-6c946c82f372" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivablePurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019efd6a-8e3f-78a9-8c39-d3d856d85401" xlink:to="loc_us-gaap_AccountsReceivablePurchase_019efd6a-e661-79c7-b084-6c946c82f372" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/RELATEDPARTYTRANSACTIONSScheduleofAllocationsforSharedServicesandGeneralCorporateCostsDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#RELATEDPARTYTRANSACTIONSScheduleofAllocationsforSharedServicesandGeneralCorporateCostsDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/RELATEDPARTYTRANSACTIONSScheduleofAllocationsforSharedServicesandGeneralCorporateCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed974-533a-7816-b61c-36e26eb9fe56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed974-533a-7816-b61c-36e26eb9fe56" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd4d-75fc-7d05-92fb-42b1b13a5a32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed974-533a-7816-b61c-36e26eb9fe56" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd4d-75fc-7d05-92fb-42b1b13a5a32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019efd4d-75fc-7d05-92fb-42b1b13a5a32_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd4d-75fc-7d05-92fb-42b1b13a5a32" xlink:to="loc_us-gaap_RelatedPartyDomain_019efd4d-75fc-7d05-92fb-42b1b13a5a32_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019efd4d-75fc-7e66-9f9a-25165579eae7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd4d-75fc-7d05-92fb-42b1b13a5a32" xlink:to="loc_us-gaap_RelatedPartyDomain_019efd4d-75fc-7e66-9f9a-25165579eae7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019efd4d-75fc-7c31-8f38-3c7e949320d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019efd4d-75fc-7e66-9f9a-25165579eae7" xlink:to="loc_us-gaap_RelatedPartyMember_019efd4d-75fc-7c31-8f38-3c7e949320d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019efd4b-fcde-7975-932b-3ba2b668d997" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019efd4b-fcde-7975-932b-3ba2b668d997" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_Rentals_019efd4c-60d1-7ce1-b332-a277b36ec59d" xlink:href="fdxf-20260531.xsd#fdxf_Rentals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_fdxf_Rentals_019efd4c-60d1-7ce1-b332-a277b36ec59d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019efd4c-969e-72a1-be18-8c45828a1b45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019efd4c-969e-72a1-be18-8c45828a1b45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfPropertyRepairsAndMaintenance_019efd4c-e8f8-767d-ba62-903cce2f48d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfPropertyRepairsAndMaintenance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_us-gaap_CostOfPropertyRepairsAndMaintenance_019efd4c-e8f8-767d-ba62-903cce2f48d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019efd4d-2534-729c-be2b-427a369b10a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019efd4d-2534-729c-be2b-427a369b10a9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019efd6c-935f-76b6-8207-04cb8f05dd95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed977-2505-795f-95e2-799421688875" xlink:to="loc_us-gaap_CostsAndExpenses_019efd6c-935f-76b6-8207-04cb8f05dd95" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/RELATEDPARTYTRANSACTIONSScheduleofNetTransferstoParentDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#RELATEDPARTYTRANSACTIONSScheduleofNetTransferstoParentDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/RELATEDPARTYTRANSACTIONSScheduleofNetTransferstoParentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019ed99a-c75a-77d2-ae0e-9f01ba4446e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed99a-c75a-759a-a943-4f35f415af8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed99a-c75a-77d2-ae0e-9f01ba4446e9" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed99a-c75a-759a-a943-4f35f415af8e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019ed99a-c75a-73e2-9735-f3531f8e0e17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed99a-c75a-759a-a943-4f35f415af8e" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019ed99a-c75a-73e2-9735-f3531f8e0e17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-73e2-9735-f3531f8e0e17_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019ed99a-c75a-73e2-9735-f3531f8e0e17" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-73e2-9735-f3531f8e0e17_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019ed99a-c75a-73e2-9735-f3531f8e0e17" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_CashPoolingAndGeneralFinancingActivitiesAndOtherMember_019efd60-55c0-7f1d-8564-b1d07fdaec49" xlink:href="fdxf-20260531.xsd#fdxf_CashPoolingAndGeneralFinancingActivitiesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:to="loc_fdxf_CashPoolingAndGeneralFinancingActivitiesAndOtherMember_019efd60-55c0-7f1d-8564-b1d07fdaec49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_TransferOfNetAssetsMember_019efd65-9757-7c36-8dec-4f0c9709403e" xlink:href="fdxf-20260531.xsd#fdxf_TransferOfNetAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:to="loc_fdxf_TransferOfNetAssetsMember_019efd65-9757-7c36-8dec-4f0c9709403e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_CashDistributionToParentMember_019efd60-a3bc-76c9-b1cd-23975e65b8f4" xlink:href="fdxf-20260531.xsd#fdxf_CashDistributionToParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:to="loc_fdxf_CashDistributionToParentMember_019efd60-a3bc-76c9-b1cd-23975e65b8f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_CorporateAndOtherAllocationsMember_019efd62-0147-763c-b546-b5f2a29a466b" xlink:href="fdxf-20260531.xsd#fdxf_CorporateAndOtherAllocationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:to="loc_fdxf_CorporateAndOtherAllocationsMember_019efd62-0147-763c-b546-b5f2a29a466b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_IncomeTaxesMember_019efd62-398b-72ee-8224-227ec3df3552" xlink:href="fdxf-20260531.xsd#fdxf_IncomeTaxesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:to="loc_fdxf_IncomeTaxesMember_019efd62-398b-72ee-8224-227ec3df3552" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockBasedCompensationEquityClassifiedAwardsMember_019efd65-3b31-77af-a292-a181ee666ca6" xlink:href="fdxf-20260531.xsd#fdxf_StockBasedCompensationEquityClassifiedAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019ed99a-c75a-7510-9264-b6def125982a" xlink:to="loc_fdxf_StockBasedCompensationEquityClassifiedAwardsMember_019efd65-3b31-77af-a292-a181ee666ca6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd5f-a564-7f27-8704-e64989dcd531" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019ed99a-c75a-759a-a943-4f35f415af8e" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd5f-a564-7f27-8704-e64989dcd531" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019efd5f-a564-7f27-8704-e64989dcd531_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd5f-a564-7f27-8704-e64989dcd531" xlink:to="loc_us-gaap_RelatedPartyDomain_019efd5f-a564-7f27-8704-e64989dcd531_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019efd5f-a564-752e-9272-65c2a1d57610" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019efd5f-a564-7f27-8704-e64989dcd531" xlink:to="loc_us-gaap_RelatedPartyDomain_019efd5f-a564-752e-9272-65c2a1d57610" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019efd66-acb8-7b55-9c11-ab270afe80e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019efd5f-a564-752e-9272-65c2a1d57610" xlink:to="loc_us-gaap_RelatedPartyMember_019efd66-acb8-7b55-9c11-ab270afe80e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockholdersEquityNetTransfersFromToParent_019efd66-acb8-762a-9f89-9b988cde1b07" xlink:href="fdxf-20260531.xsd#fdxf_StockholdersEquityNetTransfersFromToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed99a-c75a-77d2-ae0e-9f01ba4446e9" xlink:to="loc_fdxf_StockholdersEquityNetTransfersFromToParent_019efd66-acb8-762a-9f89-9b988cde1b07" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_PaymentsToParentNetFinancingActivities_019efd66-acb8-7f88-a5f6-d01891c07e4d" xlink:href="fdxf-20260531.xsd#fdxf_PaymentsToParentNetFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019ed99a-c75a-77d2-ae0e-9f01ba4446e9" xlink:to="loc_fdxf_PaymentsToParentNetFinancingActivities_019efd66-acb8-7f88-a5f6-d01891c07e4d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fedexfreight.com/role/SUBSEQUENTEVENTSDetails" xlink:type="simple" xlink:href="fdxf-20260531.xsd#SUBSEQUENTEVENTSDetails"/>
  <link:definitionLink xlink:role="http://www.fedexfreight.com/role/SUBSEQUENTEVENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019f3c1b-ba78-7435-9d19-e79456a41d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019f3c1b-ba78-77e5-8c05-8405b12cf20a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f3c1b-ba78-7435-9d19-e79456a41d2e" xlink:to="loc_us-gaap_SubsequentEventTable_019f3c1b-ba78-77e5-8c05-8405b12cf20a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019f3c22-3ffb-7c5d-860a-b21a786e9e10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019f3c1b-ba78-77e5-8c05-8405b12cf20a" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019f3c22-3ffb-7c5d-860a-b21a786e9e10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f3c22-3ffb-7c5d-860a-b21a786e9e10_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f3c22-3ffb-7c5d-860a-b21a786e9e10" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f3c22-3ffb-7c5d-860a-b21a786e9e10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019f3c22-3ffb-7927-b52a-2ac536166a8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019f3c22-3ffb-7c5d-860a-b21a786e9e10" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019f3c22-3ffb-7927-b52a-2ac536166a8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019f3c22-5736-715b-86ca-c929ae926ed9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019f3c22-3ffb-7927-b52a-2ac536166a8e" xlink:to="loc_us-gaap_SubsequentEventMember_019f3c22-5736-715b-86ca-c929ae926ed9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_StockholdersEquitySeparationTransactionPercentOfOutstandingSharesDistributed_019eda93-31cb-748c-9008-166ef84e067b" xlink:href="fdxf-20260531.xsd#fdxf_StockholdersEquitySeparationTransactionPercentOfOutstandingSharesDistributed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f3c1b-ba78-7435-9d19-e79456a41d2e" xlink:to="loc_fdxf_StockholdersEquitySeparationTransactionPercentOfOutstandingSharesDistributed_019eda93-31cb-748c-9008-166ef84e067b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_ConsiderationForSpinOffConversionRatio_019f94c4-1b8f-7ae8-ab2f-7473466ad93e" xlink:href="fdxf-20260531.xsd#fdxf_ConsiderationForSpinOffConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f3c1b-ba78-7435-9d19-e79456a41d2e" xlink:to="loc_fdxf_ConsiderationForSpinOffConversionRatio_019f94c4-1b8f-7ae8-ab2f-7473466ad93e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fdxf_RelatedPartyTransactionsTransitionServiceAgreementTerm_019f6716-5771-7ac3-a1dc-7e71f87f5420" xlink:href="fdxf-20260531.xsd#fdxf_RelatedPartyTransactionsTransitionServiceAgreementTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019f3c1b-ba78-7435-9d19-e79456a41d2e" xlink:to="loc_fdxf_RelatedPartyTransactionsTransitionServiceAgreementTerm_019f6716-5771-7ac3-a1dc-7e71f87f5420" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-roles-2026.xsd#eedm1"/>
  <link:definitionLink xlink:role="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:type="arc" order="32"/>
  </link:definitionLink>
</link:linkbase>
