2.nounThe 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."
3.nounA young person.
"There was a group of youths hanging around the parking lot, reading fashion magazines and listening to music."
4.nounA young man; a male adolescent or young adult.
5.noun(used with a plural or singular verb) Young persons, collectively.