Adjective juvenile has 2 senses
  1. juvenile - of or relating to or characteristic of or appropriate for children or young people; "juvenile diabetes"; "juvenile fashions"
  2. adolescent, jejune, juvenile, puerile - displaying or suggesting a lack of maturity; "adolescent insecurity"; "jejune responses to our problems"; "their behavior was juvenile"; "puerile jokes"
    Antonym: mature (indirect, via immature)
,Noun juvenile has 1 sense
  1. juvenile, juvenile person - a youthful person
    --1 is a kind of person, individual, someone, somebody, mortal, human, soul
    --1 has parts: juvenile body
    Antonyms: adult, grownup
    --1 has particulars:
     preteen, preteenager; adolescent, stripling, teenager; child, kid, youngster, minor, shaver, nipper, small fry, tiddler, tike, tyke, fry, nestling; ingenue; young person, youth, younker, spring chicken