juvenile(n = noun.person) juvenile person - a young person, not fully developed;
is a kind of individual, mortal, person, somebody, someone, soul
has parts: juvenile body
has particulars: preteen, preteenager, adolescent, stripling, teen, teenager, child, fry, kid, minor, nestling, nipper, shaver, small fry, tiddler, tike, tyke, youngster, ingenue, spring chicken, young person, younker, youth
Antonym: adult
Derived form adjective juvenile₁

1.  juvenile(a = adj.pert) - of or relating to or characteristic of or appropriate for children or young people; "juvenile diabetes"; "juvenile fashions"
Derived forms noun juvenile₁, noun juvenility₂

2.  juvenile(s = adj.all) adolescent, jejune, puerile - displaying or suggesting a lack of maturity; "adolescent insecurity"; "jejune responses to our problems"; "their behavior was juvenile"; "puerile jokes"
Derived form noun juvenility₁

1.  Young; youthful; as, a juvenile appearance. Glanvill. [1913 Webster]

2.  Of or pertaining to youth; as, juvenile sports.

3.  Characteristic of children; immature; childish; puerile; infantile; as, a juvenile temper tantrum. [PJC]

   A young person or youth; -- used sportively or familiarly. C. Bront'82. [1913 Webster]

juvenile, adj. & n.
--adj.
1 a young, youthful. b of or for young persons.
2 suited to or characteristic of youth.
3 often derog. immature (behaving in a very juvenile way).
--n.
1 a young person.
2 Commerce a book intended for young people.
3 an actor playing the part of a youthful person.

Idiom:
juvenile court a court for the trial of children under 17. juvenile delinquency offences committed by a person or persons below the age of legal responsibility. juvenile delinquent such an offender.

Derivative:
juvenilely adv. juvenility n.

Etymology:
L juvenilis f. juvenis young

N  youth, juvenility, juvenescence, juniority, infancy, babyhood, childhood, boyhood, girlhood, youthhood, incunabula, minority, nonage, teens, tender age, bloom, cradle, nursery, leading strings, pupilage, puberty, pucelage, prime of life, flower of life, springtide of life, seedtime of life, golden season of life, heyday of youth, school days, rising generation, young, youthful, juvenile, green, callow, budding, sappy, puisne, beardless, under age, in one's teens, in statu pupillari, younger, junior, hebetic, unfledged, youth on the prow and pleasure at the helm, youth a the glad season of life.

juvenile amaurotic idiocy, juvenile body, juvenile court, juvenile delinquency, juvenile delinquent, juvenile diabetes, juvenile hormone, juvenile person, juvenile rheumatoid arthritis, juvenile wart