Meaning of “youth” - Learner’s Dictionary

youth

noun us uk /juːθ/
He was a tall, gangly youth.The bus was ambushed by a gang of youths.He was attacked and seriously injured by a gang of youths.A gang of youths were loitering outside the cinema.Two British youths were caught hacking into government computers.
YOUNG MAN [ C ]

a young man:

gangs of youths
YOUNG PEOPLE [ group ]

B1 young people generally:

the youth of today
a youth club
sb's youth

B2 the period of time when someone is young:

I was very shy in / my youth.
QUALITY [ U ]

the quality of being young

(Definition of “youth” from the Cambridge Learner’s Dictionary © Cambridge University Press)