Young; youthful; as, a juvenile appearance.
- Not fully grown or developed; young.
- Of, relating to, characteristic of, intended for, or appropriate for children or young people: juvenile fashions.
- Marked by immaturity; childish: juvenile behavior. See Synonyms at young.
- A young person; a child.
- A young animal that has not reached sexual maturity.
- An actor who plays roles of children or young persons.
- A children's book.