The quality or state of being young.
Her youth and beauty attracted him to her.
The part of life following childhood; the period of existence preceding maturity or age; the whole early part of life, from childhood, or, sometimes, from infancy, to adulthood.
I made many mistakes in my youth, but learned from them all.
A young person.
There was a group of youths hanging around the parking lot, reading fashion magazines and listening to music.
A young man; a male adolescent or young adult.
(used with a plural or singular verb) Young persons, collectively.