From Longman Dictionary of Contemporary Englishjuvenileju‧ve‧nile /ˈdʒuːvənaɪl $ -nəl, -naɪl/ adjective 1 [only before noun] lawSCL relating to young people who are not yet adults juvenile crime a juvenile court► see thesaurus at young2 STUPID/NOT SENSIBLEsilly and typical of a child rather than an adult – used to show disapproval SYN childish a very juvenile sense of humour3 technical juvenile birds or animals are young —juvenile noun [countable]
Examples from the Corpus
juvenile• You wouldn't think that college students could be so juvenile.• O'Brien, 15, will face murder charges in juvenile court.• Juvenile crime is an increasing problem in big cities.• The public housing units have frequently become slums and hotbeds of crime, especially juvenile delinquency.• a juvenile desire to shock people• Many juvenile offenders were being put in adult prisons.• Some of the boys tried to involve me in their juvenile pranks, but I wasn't interested.Origin juvenile (1600-1700) Latin juvenilis, from juvenis “young person” 