The difference between Juvenile and Juvie

When used as nouns, juvenile means a prepubescent child, whereas juvie means a youth detention centre.

Juvenile is also adjective with the meaning: young.

check bellow for the other definitions of Juvenile and Juvie

Juvenile as an adjective:

Young; not fully developed.
Juvenile as an adjective:

Characteristic of youth or immaturity; childish.

Juvenile as a noun:

A prepubescent child.
Juvenile as a noun:

A person younger than the age of majority; a minor.
Juvenile as a noun (criminal law):

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.
Juvenile as a noun (literature):

A publication for young adult readers.
Juvenile as a noun (theater):

An actor playing a child's role.
Juvenile as a noun (zoology):

A sexually immature animal.