Definition of juvenile noun from the Oxford Advanced Learner's Dictionary

 

juvenile

 noun
noun
BrE BrE//ˈdʒuːvənaɪl//
 
; NAmE NAmE//ˈdʒuːvənl//
 
 
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(formal or law) a young person who is not yet an adult Most of the suspects were juveniles under the age of 17. Word Origin early 17th cent.: from Latin juvenilis, from juvenis ‘young, a young person’.
See the Oxford Advanced American Dictionary entry: juvenile