to lockverb/tɾɐ̃ˈkaɾ/mediumtran·carPortuguesEnglishEspanolFrancaisDefinitionTo fasten something securely so that it cannot be opened.I will lock the door before leaving.He locked the car.synsecurefastenantunlockEtymologyDo latim 'truncare'Related wordstrancadotrancamentotrancadora