What is the meaning of Juvenile?

Young; not fully developed.

Characteristic of youth or immaturity; childish.

A prepubescent child.

A person younger than the age of majority; a minor.

A person younger than the age of full criminal responsibility, such that the person either cannot be held criminally liable or is subject to less severe forms of punishment.

A publication for young adult readers.

An actor playing a child's role.

A sexually immature animal.

A two-year-old racehorse.

nominative/accusative/vocative neuter singular of juvenīlis

definite natural masculine singular of juvenil

Source: wiktionary.org