青少年は英語で
youth

英語の定義

青少年
1. n. a youth or young person

youth
1. 名詞. (uncountable+) 若さ、年若であること、若々しさ、未熟さ。
Her youth and beauty attracted him to her., 彼女の若さと美しさが彼を惹きつけた。
2. 名詞. (uncountable+) 青年期、青春時代、わかいころ。
Make the most of your youth, it will not last forever., 青春時代を思いきり楽しみなさい、それは永遠に続くというものではないのだから。
I made many mistakes in my youth, but learned from them all., 私は若いころに多くの間違いを犯したものだが、それらすべてから教訓を得た。
3. 名詞. (countable+) 若者。
There was a group of youths hanging around the parking lot, reading fashion magazines and listening to music., ファッション雑誌を読んだり、音楽を聞きながら、駐車場の周りにたむろしている若者のグループがいた。
4. 名詞. (countable+) 若い男性。
5. 名詞. (複数形で) 若年層。

youth
1. n. The quality or state of being young.
Her youth and beauty attracted him to her.
2. n. 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.
Make the most of your youth, it will not last forever.
I made many mistakes in my youth, but learned from them all.
3. n. A young person.
There was a group of youths hanging around the parking lot, reading fashion magazines and listening to music.
4. n. A young man; a male adolescent or young adult.
5. n. (used in plural form) Young persons, collectively.