1.
teens; teenage years; one's teens
The period of life from age 10 to 19. Used to refer to teenage years in general or to someone who is a teenager.
十代の頃を思い出す。
I recall my teenage years.
十代の若者に人気のブランドだ。
It's a brand popular with teenagers.
彼女は十代の後半からプロとして活躍している。
She has been active as a professional since her late teens.
十代 refers to the teenage years (ages 10-19). Part of the 〜代 pattern used for all age decades.
AGE DECADE PATTERN:
- 十代: teens (10-19)
- 二十代: twenties (20-29)
- 三十代: thirties (30-39)
- And so on for each decade
COMMON COLLOCATIONS:
- 十代の若者: teenagers
- 十代の頃: during one's teens
- 十代前半: early teens (10-14)
- 十代後半: late teens (15-19)
NOTE:
Unlike the English word "teenager" (13-19), 十代 technically includes 10-12 year olds as well. In practice, context usually makes the intended range clear.