Refers to young people collectively, the period of being young, or youth-oriented activities and culture. Common in compounds like ユースホステル (youth hostel) and ユース世代 (youth generation).
This smartphone was developed with young people in mind.
This program aims to develop youth.
Opportunities to hear the opinions of the youth generation are increasing.
He's a player who was outstanding at the youth level.
ユーズド (used/secondhand) sounds similar to ユース (youth) but describes goods that have already been used, not young people.
Loanword from English 'youth'.
youth market