adultnounmasculine/ɐˈdul.tu/mediuma·dul·toPortuguesEnglishEspanolFrancaisDefinitionA person who has reached adulthood; a mature individual.He is a responsible adult.Adults should take care of children.synmaturegrown-upantchildEtymologyDo latim 'adultus'Related wordsadultaadultosadultice