<?xml version="1.0" encoding="utf-8"?>
<!-- Created by:  XBRL Wizard, EasyX -->
<!-- Document created: 22-03-2026 22:29:06 -->
<!-- Version:  -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance">
  <link:roleRef roleURI="https://rovsing.ocm/xbrl/role/all/ias_1_role-410000" xlink:type="simple" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ias_1_role-410000" />
  <link:roleRef roleURI="https://rovsing.ocm/xbrl/role/all/ias_1_role-210000" xlink:type="simple" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ias_1_role-210000" />
  <link:roleRef roleURI="https://rovsing.ocm/xbrl/role/all/ias_1_role-610000" xlink:type="simple" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ias_1_role-610000" />
  <link:roleRef roleURI="https://rovsing.ocm/xbrl/role/all/ias_7_role-520000" xlink:type="simple" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ias_7_role-520000" />
  <link:roleRef roleURI="https://rovsing.ocm/role/Anchoring-999999" xlink:type="simple" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_Anchoring-999999" />
  <link:roleRef roleURI="https://www.esma.europa.eu/xbrl/role/cor/esef_role-999999" xlink:type="simple" xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_role-999999" />
  <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/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: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://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd#wider-narrower" />
  <link:definitionLink xlink:type="extended" xlink:role="https://rovsing.ocm/xbrl/role/all/ias_1_role-410000">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:label="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:title="ifrs-full_StatementOfComprehensiveIncomeAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_Revenue" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_Revenue" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:label="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:title="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherWorkPerformedByEntityAndCapitalised" xlink:label="ifrs-full_OtherWorkPerformedByEntityAndCapitalised" xlink:title="ifrs-full_OtherWorkPerformedByEntityAndCapitalised" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_OtherWorkPerformedByEntityAndCapitalised" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_OtherWorkPerformedByEntityAndCapitalised" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GrossProfit" xlink:label="ifrs-full_GrossProfit" xlink:title="ifrs-full_GrossProfit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_GrossProfit" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_GrossProfit" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherExpenseByNature" xlink:label="ifrs-full_OtherExpenseByNature" xlink:title="ifrs-full_OtherExpenseByNature" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_OtherExpenseByNature" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_OtherExpenseByNature" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EmployeeBenefitsExpense" xlink:label="ifrs-full_EmployeeBenefitsExpense" xlink:title="ifrs-full_EmployeeBenefitsExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_EmployeeBenefitsExpense" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_EmployeeBenefitsExpense" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_Ebitda" xlink:label="Rovsing_Ebitda" xlink:title="Rovsing_Ebitda" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="Rovsing_Ebitda" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelRovsing_Ebitda" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="ifrs-full_ProfitLossFromOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_ProfitLossFromOperatingActivities" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome" xlink:title="ifrs-full_FinanceIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_FinanceIncome" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_FinanceIncome" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts" xlink:title="ifrs-full_FinanceCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_FinanceCosts" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_FinanceCosts" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:title="ifrs-full_ProfitLossBeforeTax" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_ProfitLossBeforeTax" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_IncomeTaxExpenseContinuingOperations" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_ProfitLoss" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_ProfitLoss" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_ComprehensiveIncome" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:title="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BasicEarningsLossPerShare" xlink:label="ifrs-full_BasicEarningsLossPerShare" xlink:title="ifrs-full_BasicEarningsLossPerShare" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_BasicEarningsLossPerShare" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_BasicEarningsLossPerShare" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DilutedEarningsLossPerShare" xlink:label="ifrs-full_DilutedEarningsLossPerShare" xlink:title="ifrs-full_DilutedEarningsLossPerShare" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="ifrs-full_DilutedEarningsLossPerShare" xlink:title="definition: ifrs-full_StatementOfComprehensiveIncomeAbstract to labelifrs-full_DilutedEarningsLossPerShare" order="170.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="https://rovsing.ocm/xbrl/role/all/ias_1_role-210000">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfFinancialPositionAbstract" xlink:label="ifrs-full_StatementOfFinancialPositionAbstract" xlink:title="ifrs-full_StatementOfFinancialPositionAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AssetsAbstract" xlink:label="ifrs-full_AssetsAbstract" xlink:title="ifrs-full_AssetsAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_AssetsAbstract" xlink:title="definition: ifrs-full_StatementOfFinancialPositionAbstract to labelifrs-full_AssetsAbstract" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComputerSoftware" xlink:label="ifrs-full_ComputerSoftware" xlink:title="ifrs-full_ComputerSoftware" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_ComputerSoftware" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_ComputerSoftware" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IntangibleAssetsUnderDevelopment" xlink:label="ifrs-full_IntangibleAssetsUnderDevelopment" xlink:title="ifrs-full_IntangibleAssetsUnderDevelopment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_IntangibleAssetsUnderDevelopment" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_IntangibleAssetsUnderDevelopment" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IntangibleAssetsAndGoodwill" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_IntangibleAssetsAndGoodwill" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:title="ifrs-full_PropertyPlantAndEquipment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_PropertyPlantAndEquipment" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:title="ifrs-full_RightofuseAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_RightofuseAssets" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_RightofuseAssets" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsNoncurrent" xlink:label="ifrs-full_CurrentTaxAssetsNoncurrent" xlink:title="ifrs-full_CurrentTaxAssetsNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CurrentTaxAssetsNoncurrent" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_CurrentTaxAssetsNoncurrent" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets" xlink:title="ifrs-full_DeferredTaxAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_DeferredTaxAssets" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_DeferredTaxAssets" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentAssets" xlink:label="ifrs-full_OtherNoncurrentAssets" xlink:title="ifrs-full_OtherNoncurrentAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_OtherNoncurrentAssets" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_OtherNoncurrentAssets" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:title="ifrs-full_NoncurrentAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_NoncurrentAssets" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_NoncurrentAssets" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:title="ifrs-full_Inventories" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_Inventories" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_Inventories" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentTradeReceivables" xlink:label="ifrs-full_NoncurrentTradeReceivables" xlink:title="ifrs-full_NoncurrentTradeReceivables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_NoncurrentTradeReceivables" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_NoncurrentTradeReceivables" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ContractWorkInProgressCurrent" xlink:label="Rovsing_ContractWorkInProgressCurrent" xlink:title="Rovsing_ContractWorkInProgressCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="Rovsing_ContractWorkInProgressCurrent" xlink:title="definition: ifrs-full_AssetsAbstract to labelRovsing_ContractWorkInProgressCurrent" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsCurrent" xlink:label="ifrs-full_CurrentTaxAssetsCurrent" xlink:title="ifrs-full_CurrentTaxAssetsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CurrentTaxAssetsCurrent" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_CurrentTaxAssetsCurrent" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentReceivables" xlink:label="ifrs-full_OtherNoncurrentReceivables" xlink:title="ifrs-full_OtherNoncurrentReceivables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_OtherNoncurrentReceivables" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_OtherNoncurrentReceivables" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Prepayments" xlink:label="ifrs-full_Prepayments" xlink:title="ifrs-full_Prepayments" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_Prepayments" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_Prepayments" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentPrepaidExpenses" xlink:label="ifrs-full_CurrentPrepaidExpenses" xlink:title="ifrs-full_CurrentPrepaidExpenses" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CurrentPrepaidExpenses" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_CurrentPrepaidExpenses" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_CashAndCashEquivalents" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:title="ifrs-full_CurrentAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_CurrentAssets" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_CurrentAssets" order="170.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:title="ifrs-full_Assets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_AssetsAbstract" xlink:to="ifrs-full_Assets" xlink:title="definition: ifrs-full_AssetsAbstract to labelifrs-full_Assets" order="180.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAndLiabilitiesAbstract" xlink:label="ifrs-full_EquityAndLiabilitiesAbstract" xlink:title="ifrs-full_EquityAndLiabilitiesAbstract" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="ifrs-full_EquityAndLiabilitiesAbstract" xlink:title="definition: ifrs-full_StatementOfFinancialPositionAbstract to labelifrs-full_EquityAndLiabilitiesAbstract" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapital" xlink:label="ifrs-full_IssuedCapital" xlink:title="ifrs-full_IssuedCapital" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_IssuedCapital" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_IssuedCapital" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReservesForDevelopmentCosts" xlink:label="Rovsing_ReservesForDevelopmentCosts" xlink:title="Rovsing_ReservesForDevelopmentCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="Rovsing_ReservesForDevelopmentCosts" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelRovsing_ReservesForDevelopmentCosts" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarnings" xlink:label="ifrs-full_RetainedEarnings" xlink:title="ifrs-full_RetainedEarnings" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_RetainedEarnings" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_RetainedEarnings" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_Equity" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_Equity" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:label="Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:title="Rovsing_DebtToCreditInstitutionsNonCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelRovsing_DebtToCreditInstitutionsNonCurrent" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:label="ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:title="ifrs-full_OtherNoncurrentFinancialLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_OtherNoncurrentFinancialLiabilities" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="ifrs-full_NoncurrentLeaseLiabilities" xlink:title="ifrs-full_NoncurrentLeaseLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_NoncurrentLeaseLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_NoncurrentLeaseLiabilities" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:title="ifrs-full_NoncurrentLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_NoncurrentLiabilities" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_DebtToCreditInstitutionsCurrent" xlink:label="Rovsing_DebtToCreditInstitutionsCurrent" xlink:title="Rovsing_DebtToCreditInstitutionsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="Rovsing_DebtToCreditInstitutionsCurrent" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelRovsing_DebtToCreditInstitutionsCurrent" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentNonfinancialLiabilities" xlink:label="ifrs-full_OtherCurrentNonfinancialLiabilities" xlink:title="ifrs-full_OtherCurrentNonfinancialLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_OtherCurrentNonfinancialLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_OtherCurrentNonfinancialLiabilities" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="ifrs-full_CurrentLeaseLiabilities" xlink:title="ifrs-full_CurrentLeaseLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_CurrentLeaseLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_CurrentLeaseLiabilities" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AccrualsClassifiedAsCurrent" xlink:label="ifrs-full_AccrualsClassifiedAsCurrent" xlink:title="ifrs-full_AccrualsClassifiedAsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_AccrualsClassifiedAsCurrent" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_AccrualsClassifiedAsCurrent" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:title="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherPayables" xlink:label="ifrs-full_OtherPayables" xlink:title="ifrs-full_OtherPayables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_OtherPayables" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_OtherPayables" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" xlink:label="ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" xlink:title="ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:title="ifrs-full_CurrentLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_CurrentLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_CurrentLiabilities" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:title="ifrs-full_Liabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_Liabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_Liabilities" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAndLiabilities" xlink:label="ifrs-full_EquityAndLiabilities" xlink:title="ifrs-full_EquityAndLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="ifrs-full_EquityAndLiabilities" xlink:title="definition: ifrs-full_EquityAndLiabilitiesAbstract to labelifrs-full_EquityAndLiabilities" order="170.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="https://rovsing.ocm/xbrl/role/all/ias_1_role-610000">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityAbstract" xlink:label="ifrs-full_StatementOfChangesInEquityAbstract" xlink:title="ifrs-full_StatementOfChangesInEquityAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityTable" xlink:label="ifrs-full_StatementOfChangesInEquityTable" xlink:title="ifrs-full_StatementOfChangesInEquityTable" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_StatementOfChangesInEquityTable" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_StatementOfChangesInEquityTable" order="0.0" xbrldt:closed="true" xbrldt:contextElement="scenario" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComponentsOfEquityAxis" xlink:label="ifrs-full_ComponentsOfEquityAxis" xlink:title="ifrs-full_ComponentsOfEquityAxis" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="ifrs-full_StatementOfChangesInEquityTable" xlink:to="ifrs-full_ComponentsOfEquityAxis" xlink:title="definition: ifrs-full_StatementOfChangesInEquityTable to labelifrs-full_ComponentsOfEquityAxis" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityMember" xlink:label="ifrs-full_EquityMember" xlink:title="ifrs-full_EquityMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="ifrs-full_ComponentsOfEquityAxis" xlink:to="ifrs-full_EquityMember" xlink:title="definition: ifrs-full_ComponentsOfEquityAxis to labelifrs-full_EquityMember" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapitalMember" xlink:label="ifrs-full_IssuedCapitalMember" xlink:title="ifrs-full_IssuedCapitalMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_IssuedCapitalMember" xlink:title="definition: ifrs-full_EquityMember to labelifrs-full_IssuedCapitalMember" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarningsMember" xlink:label="ifrs-full_RetainedEarningsMember" xlink:title="ifrs-full_RetainedEarningsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="ifrs-full_RetainedEarningsMember" xlink:title="definition: ifrs-full_EquityMember to labelifrs-full_RetainedEarningsMember" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReservesForDevelopmentCostsMember" xlink:label="Rovsing_ReservesForDevelopmentCostsMember" xlink:title="Rovsing_ReservesForDevelopmentCostsMember" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_EquityMember" xlink:to="Rovsing_ReservesForDevelopmentCostsMember" xlink:title="definition: ifrs-full_EquityMember to labelRovsing_ReservesForDevelopmentCostsMember" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_Equity" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_Equity" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:label="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:title="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelRovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_TransferredBetweenReserves" xlink:label="Rovsing_TransferredBetweenReserves" xlink:title="Rovsing_TransferredBetweenReserves" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="Rovsing_TransferredBetweenReserves" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelRovsing_TransferredBetweenReserves" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_ComprehensiveIncome" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" xlink:title="ifrs-full_IssueOfEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_IssueOfEquity" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_IssueOfEquity" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ShareIssueRelatedCost" xlink:label="ifrs-full_ShareIssueRelatedCost" xlink:title="ifrs-full_ShareIssueRelatedCost" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_ShareIssueRelatedCost" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_ShareIssueRelatedCost" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:title="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity_2" xlink:title="ifrs-full_Equity_2" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="ifrs-full_Equity_2" xlink:title="definition: ifrs-full_StatementOfChangesInEquityAbstract to labelifrs-full_Equity_2" order="90.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="https://rovsing.ocm/xbrl/role/all/ias_7_role-520000">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfCashFlowsAbstract" xlink:label="ifrs-full_StatementOfCashFlowsAbstract" xlink:title="ifrs-full_StatementOfCashFlowsAbstract" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_ProfitLoss" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_ProfitLoss" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:label="ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:title="ifrs-full_OtherAdjustmentsToReconcileProfitLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_OtherAdjustmentsToReconcileProfitLoss" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForFinanceIncome" xlink:label="ifrs-full_AdjustmentsForFinanceIncome" xlink:title="ifrs-full_AdjustmentsForFinanceIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_AdjustmentsForFinanceIncome" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_AdjustmentsForFinanceIncome" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForFinanceCosts" xlink:label="ifrs-full_AdjustmentsForFinanceCosts" xlink:title="ifrs-full_AdjustmentsForFinanceCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_AdjustmentsForFinanceCosts" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_AdjustmentsForFinanceCosts" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:label="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:title="ifrs-full_AdjustmentsForIncomeTaxExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_AdjustmentsForIncomeTaxExpense" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:title="ifrs-full_IncreaseDecreaseInWorkingCapital" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_IncreaseDecreaseInWorkingCapital" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperations" xlink:label="ifrs-full_CashFlowsFromUsedInOperations" xlink:title="ifrs-full_CashFlowsFromUsedInOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInOperations" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashFlowsFromUsedInOperations" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:title="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_InterestReceivedClassifiedAsOperatingActivities" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:title="ifrs-full_InterestPaidClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_InterestPaidClassifiedAsOperatingActivities" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:label="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashFlowsFromUsedInOperatingActivities" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReceivedDevelopmentSubsidies" xlink:label="Rovsing_ReceivedDevelopmentSubsidies" xlink:title="Rovsing_ReceivedDevelopmentSubsidies" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="Rovsing_ReceivedDevelopmentSubsidies" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelRovsing_ReceivedDevelopmentSubsidies" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashFlowsFromUsedInInvestingActivities" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:title="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" order="170.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:title="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" order="180.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" xlink:title="ifrs-full_ProceedsFromIssuingShares" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_ProceedsFromIssuingShares" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_ProceedsFromIssuingShares" order="190.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PaymentsForShareIssueCosts" xlink:label="ifrs-full_PaymentsForShareIssueCosts" xlink:title="ifrs-full_PaymentsForShareIssueCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_PaymentsForShareIssueCosts" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_PaymentsForShareIssueCosts" order="200.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashFlowsFromUsedInFinancingActivities" order="210.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_IncreaseDecreaseInCashAndCashEquivalents" order="220.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashAndCashEquivalents" order="230.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents_2" xlink:title="ifrs-full_CashAndCashEquivalents_2" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ifrs-full_StatementOfCashFlowsAbstract" xlink:to="ifrs-full_CashAndCashEquivalents_2" xlink:title="definition: ifrs-full_StatementOfCashFlowsAbstract to labelifrs-full_CashAndCashEquivalents_2" order="240.0" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="https://rovsing.ocm/role/Anchoring-999999">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivitiesDiscontinuedOperations" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_Ebitda" xlink:label="Rovsing_Ebitda" xlink:title="Rovsing_Ebitda" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReceivedDevelopmentSubsidies" xlink:label="Rovsing_ReceivedDevelopmentSubsidies" xlink:title="Rovsing_ReceivedDevelopmentSubsidies" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="Rovsing_ReceivedDevelopmentSubsidies" xlink:title="definition: ifrs-full_CashFlowsFromUsedInInvestingActivities to labelRovsing_ReceivedDevelopmentSubsidies" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_TransferredBetweenReserves" xlink:label="Rovsing_TransferredBetweenReserves" xlink:title="Rovsing_TransferredBetweenReserves" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_ComprehensiveIncome" xlink:to="Rovsing_TransferredBetweenReserves" xlink:title="definition: ifrs-full_ComprehensiveIncome to labelRovsing_TransferredBetweenReserves" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:label="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:title="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_ComprehensiveIncome" xlink:to="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:title="definition: ifrs-full_ComprehensiveIncome to labelRovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:title="ifrs-full_CurrentLiabilities" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_DebtToCreditInstitutionsCurrent" xlink:label="Rovsing_DebtToCreditInstitutionsCurrent" xlink:title="Rovsing_DebtToCreditInstitutionsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_CurrentLiabilities" xlink:to="Rovsing_DebtToCreditInstitutionsCurrent" xlink:title="definition: ifrs-full_CurrentLiabilities to labelRovsing_DebtToCreditInstitutionsCurrent" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:title="ifrs-full_NoncurrentLiabilities" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:label="Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:title="Rovsing_DebtToCreditInstitutionsNonCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_NoncurrentLiabilities" xlink:to="Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:title="definition: ifrs-full_NoncurrentLiabilities to labelRovsing_DebtToCreditInstitutionsNonCurrent" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReservesForDevelopmentCosts" xlink:label="Rovsing_ReservesForDevelopmentCosts" xlink:title="Rovsing_ReservesForDevelopmentCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_Equity" xlink:to="Rovsing_ReservesForDevelopmentCosts" xlink:title="definition: ifrs-full_Equity to labelRovsing_ReservesForDevelopmentCosts" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:title="ifrs-full_CurrentAssets" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ContractWorkInProgressCurrent" xlink:label="Rovsing_ContractWorkInProgressCurrent" xlink:title="Rovsing_ContractWorkInProgressCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:from="ifrs-full_CurrentAssets" xlink:to="Rovsing_ContractWorkInProgressCurrent" xlink:title="definition: ifrs-full_CurrentAssets to labelRovsing_ContractWorkInProgressCurrent" order="0.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="ifrs-full_ProfitLossFromOperatingActivities" />
  </link:definitionLink>
  <link:definitionLink xlink:type="extended" xlink:role="https://www.esma.europa.eu/xbrl/role/cor/esef_role-999999">
    <link:loc xlink:type="locator" xlink:href="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd#esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:label="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:title="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue" xlink:title="ifrs-full_Revenue" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Revenue" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_Revenue" order="10.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:label="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:title="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" order="20.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherWorkPerformedByEntityAndCapitalised" xlink:label="ifrs-full_OtherWorkPerformedByEntityAndCapitalised" xlink:title="ifrs-full_OtherWorkPerformedByEntityAndCapitalised" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherWorkPerformedByEntityAndCapitalised" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherWorkPerformedByEntityAndCapitalised" order="30.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GrossProfit" xlink:label="ifrs-full_GrossProfit" xlink:title="ifrs-full_GrossProfit" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_GrossProfit" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_GrossProfit" order="40.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherExpenseByNature" xlink:label="ifrs-full_OtherExpenseByNature" xlink:title="ifrs-full_OtherExpenseByNature" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherExpenseByNature" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherExpenseByNature" order="50.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EmployeeBenefitsExpense" xlink:label="ifrs-full_EmployeeBenefitsExpense" xlink:title="ifrs-full_EmployeeBenefitsExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_EmployeeBenefitsExpense" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_EmployeeBenefitsExpense" order="60.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_Ebitda" xlink:label="Rovsing_Ebitda" xlink:title="Rovsing_Ebitda" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_Ebitda" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_Ebitda" order="70.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" order="80.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="ifrs-full_ProfitLossFromOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLossFromOperatingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ProfitLossFromOperatingActivities" order="90.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome" xlink:title="ifrs-full_FinanceIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_FinanceIncome" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_FinanceIncome" order="100.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts" xlink:title="ifrs-full_FinanceCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_FinanceCosts" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_FinanceCosts" order="110.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax" xlink:title="ifrs-full_ProfitLossBeforeTax" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLossBeforeTax" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ProfitLossBeforeTax" order="120.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IncomeTaxExpenseContinuingOperations" order="130.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss" xlink:title="ifrs-full_ProfitLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProfitLoss" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ProfitLoss" order="140.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome" xlink:title="ifrs-full_ComprehensiveIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ComprehensiveIncome" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ComprehensiveIncome" order="150.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:label="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:title="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" order="160.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BasicEarningsLossPerShare" xlink:label="ifrs-full_BasicEarningsLossPerShare" xlink:title="ifrs-full_BasicEarningsLossPerShare" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_BasicEarningsLossPerShare" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_BasicEarningsLossPerShare" order="170.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DilutedEarningsLossPerShare" xlink:label="ifrs-full_DilutedEarningsLossPerShare" xlink:title="ifrs-full_DilutedEarningsLossPerShare" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DilutedEarningsLossPerShare" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_DilutedEarningsLossPerShare" order="180.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComputerSoftware" xlink:label="ifrs-full_ComputerSoftware" xlink:title="ifrs-full_ComputerSoftware" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ComputerSoftware" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ComputerSoftware" order="190.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IntangibleAssetsUnderDevelopment" xlink:label="ifrs-full_IntangibleAssetsUnderDevelopment" xlink:title="ifrs-full_IntangibleAssetsUnderDevelopment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IntangibleAssetsUnderDevelopment" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IntangibleAssetsUnderDevelopment" order="200.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IntangibleAssetsAndGoodwill" xlink:label="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="ifrs-full_IntangibleAssetsAndGoodwill" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IntangibleAssetsAndGoodwill" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IntangibleAssetsAndGoodwill" order="210.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment" xlink:title="ifrs-full_PropertyPlantAndEquipment" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PropertyPlantAndEquipment" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_PropertyPlantAndEquipment" order="220.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets" xlink:title="ifrs-full_RightofuseAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_RightofuseAssets" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_RightofuseAssets" order="230.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsNoncurrent" xlink:label="ifrs-full_CurrentTaxAssetsNoncurrent" xlink:title="ifrs-full_CurrentTaxAssetsNoncurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentTaxAssetsNoncurrent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentTaxAssetsNoncurrent" order="240.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets" xlink:title="ifrs-full_DeferredTaxAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_DeferredTaxAssets" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_DeferredTaxAssets" order="250.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentAssets" xlink:label="ifrs-full_OtherNoncurrentAssets" xlink:title="ifrs-full_OtherNoncurrentAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentAssets" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherNoncurrentAssets" order="260.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets" xlink:title="ifrs-full_NoncurrentAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentAssets" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_NoncurrentAssets" order="270.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories" xlink:title="ifrs-full_Inventories" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Inventories" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_Inventories" order="280.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentTradeReceivables" xlink:label="ifrs-full_NoncurrentTradeReceivables" xlink:title="ifrs-full_NoncurrentTradeReceivables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentTradeReceivables" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_NoncurrentTradeReceivables" order="290.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ContractWorkInProgressCurrent" xlink:label="Rovsing_ContractWorkInProgressCurrent" xlink:title="Rovsing_ContractWorkInProgressCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_ContractWorkInProgressCurrent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_ContractWorkInProgressCurrent" order="300.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsCurrent" xlink:label="ifrs-full_CurrentTaxAssetsCurrent" xlink:title="ifrs-full_CurrentTaxAssetsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentTaxAssetsCurrent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentTaxAssetsCurrent" order="310.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentReceivables" xlink:label="ifrs-full_OtherNoncurrentReceivables" xlink:title="ifrs-full_OtherNoncurrentReceivables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentReceivables" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherNoncurrentReceivables" order="320.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Prepayments" xlink:label="ifrs-full_Prepayments" xlink:title="ifrs-full_Prepayments" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Prepayments" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_Prepayments" order="330.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentPrepaidExpenses" xlink:label="ifrs-full_CurrentPrepaidExpenses" xlink:title="ifrs-full_CurrentPrepaidExpenses" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentPrepaidExpenses" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentPrepaidExpenses" order="340.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents" xlink:title="ifrs-full_CashAndCashEquivalents" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashAndCashEquivalents" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CashAndCashEquivalents" order="350.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets" xlink:title="ifrs-full_CurrentAssets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentAssets" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentAssets" order="360.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets" xlink:title="ifrs-full_Assets" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Assets" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_Assets" order="370.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapital" xlink:label="ifrs-full_IssuedCapital" xlink:title="ifrs-full_IssuedCapital" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IssuedCapital" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IssuedCapital" order="380.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReservesForDevelopmentCosts" xlink:label="Rovsing_ReservesForDevelopmentCosts" xlink:title="Rovsing_ReservesForDevelopmentCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_ReservesForDevelopmentCosts" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_ReservesForDevelopmentCosts" order="390.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarnings" xlink:label="ifrs-full_RetainedEarnings" xlink:title="ifrs-full_RetainedEarnings" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_RetainedEarnings" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_RetainedEarnings" order="400.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity" xlink:title="ifrs-full_Equity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Equity" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_Equity" order="410.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:label="Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:title="Rovsing_DebtToCreditInstitutionsNonCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_DebtToCreditInstitutionsNonCurrent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_DebtToCreditInstitutionsNonCurrent" order="420.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:label="ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:title="ifrs-full_OtherNoncurrentFinancialLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherNoncurrentFinancialLiabilities" order="430.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="ifrs-full_NoncurrentLeaseLiabilities" xlink:title="ifrs-full_NoncurrentLeaseLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentLeaseLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_NoncurrentLeaseLiabilities" order="440.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities" xlink:title="ifrs-full_NoncurrentLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_NoncurrentLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_NoncurrentLiabilities" order="450.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_DebtToCreditInstitutionsCurrent" xlink:label="Rovsing_DebtToCreditInstitutionsCurrent" xlink:title="Rovsing_DebtToCreditInstitutionsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_DebtToCreditInstitutionsCurrent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_DebtToCreditInstitutionsCurrent" order="460.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentNonfinancialLiabilities" xlink:label="ifrs-full_OtherCurrentNonfinancialLiabilities" xlink:title="ifrs-full_OtherCurrentNonfinancialLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherCurrentNonfinancialLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherCurrentNonfinancialLiabilities" order="470.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="ifrs-full_CurrentLeaseLiabilities" xlink:title="ifrs-full_CurrentLeaseLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentLeaseLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentLeaseLiabilities" order="480.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AccrualsClassifiedAsCurrent" xlink:label="ifrs-full_AccrualsClassifiedAsCurrent" xlink:title="ifrs-full_AccrualsClassifiedAsCurrent" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AccrualsClassifiedAsCurrent" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_AccrualsClassifiedAsCurrent" order="490.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:title="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" order="500.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherPayables" xlink:label="ifrs-full_OtherPayables" xlink:title="ifrs-full_OtherPayables" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherPayables" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherPayables" order="510.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" xlink:label="ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" xlink:title="ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentDeferredIncomeIncludingCurrentContractLiabilities" order="520.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities" xlink:title="ifrs-full_CurrentLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CurrentLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CurrentLiabilities" order="530.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities" xlink:title="ifrs-full_Liabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_Liabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_Liabilities" order="540.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAndLiabilities" xlink:label="ifrs-full_EquityAndLiabilities" xlink:title="ifrs-full_EquityAndLiabilities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_EquityAndLiabilities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_EquityAndLiabilities" order="550.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:label="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:title="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_ComprehensiveIncomeBeforeTransferredBetweenReserves" order="560.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_TransferredBetweenReserves" xlink:label="Rovsing_TransferredBetweenReserves" xlink:title="Rovsing_TransferredBetweenReserves" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_TransferredBetweenReserves" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_TransferredBetweenReserves" order="570.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssueOfEquity" xlink:label="ifrs-full_IssueOfEquity" xlink:title="ifrs-full_IssueOfEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IssueOfEquity" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IssueOfEquity" order="580.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ShareIssueRelatedCost" xlink:label="ifrs-full_ShareIssueRelatedCost" xlink:title="ifrs-full_ShareIssueRelatedCost" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ShareIssueRelatedCost" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ShareIssueRelatedCost" order="590.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:label="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:title="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IncreaseDecreaseThroughExerciseOfWarrantsEquity" order="600.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IncreaseDecreaseThroughTransactionsWithOwners" order="610.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" order="620.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:label="ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:title="ifrs-full_OtherAdjustmentsToReconcileProfitLoss" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_OtherAdjustmentsToReconcileProfitLoss" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_OtherAdjustmentsToReconcileProfitLoss" order="630.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForFinanceIncome" xlink:label="ifrs-full_AdjustmentsForFinanceIncome" xlink:title="ifrs-full_AdjustmentsForFinanceIncome" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForFinanceIncome" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_AdjustmentsForFinanceIncome" order="640.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForFinanceCosts" xlink:label="ifrs-full_AdjustmentsForFinanceCosts" xlink:title="ifrs-full_AdjustmentsForFinanceCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForFinanceCosts" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_AdjustmentsForFinanceCosts" order="650.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:label="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:title="ifrs-full_AdjustmentsForIncomeTaxExpense" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_AdjustmentsForIncomeTaxExpense" order="660.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" order="670.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:label="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:title="ifrs-full_IncreaseDecreaseInWorkingCapital" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IncreaseDecreaseInWorkingCapital" order="680.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperations" xlink:label="ifrs-full_CashFlowsFromUsedInOperations" xlink:title="ifrs-full_CashFlowsFromUsedInOperations" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInOperations" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CashFlowsFromUsedInOperations" order="690.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:title="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_InterestReceivedClassifiedAsOperatingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_InterestReceivedClassifiedAsOperatingActivities" order="700.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:title="ifrs-full_InterestPaidClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_InterestPaidClassifiedAsOperatingActivities" order="710.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:label="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" order="720.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CashFlowsFromUsedInOperatingActivities" order="730.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" order="740.0" />
    <link:loc xlink:type="locator" xlink:href="Rovsing-2025-12-31.xsd#Rovsing_ReceivedDevelopmentSubsidies" xlink:label="Rovsing_ReceivedDevelopmentSubsidies" xlink:title="Rovsing_ReceivedDevelopmentSubsidies" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="Rovsing_ReceivedDevelopmentSubsidies" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelRovsing_ReceivedDevelopmentSubsidies" order="750.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" order="760.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CashFlowsFromUsedInInvestingActivities" order="770.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:title="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" order="780.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:title="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" order="790.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares" xlink:title="ifrs-full_ProceedsFromIssuingShares" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_ProceedsFromIssuingShares" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_ProceedsFromIssuingShares" order="800.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PaymentsForShareIssueCosts" xlink:label="ifrs-full_PaymentsForShareIssueCosts" xlink:title="ifrs-full_PaymentsForShareIssueCosts" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_PaymentsForShareIssueCosts" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_PaymentsForShareIssueCosts" order="810.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_CashFlowsFromUsedInFinancingActivities" order="820.0" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" />
    <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder" xlink:to="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:title="definition: esef_cor_LineItemsNotDimensionallyQualifiedPlaceholder to labelifrs-full_IncreaseDecreaseInCashAndCashEquivalents" order="830.0" />
  </link:definitionLink>
</link:linkbase>