teens noun
ADJ. early a girl in her early teens | late | mid
VERB + TEENS reach He didn't want to share a room with his brother once he reached his teens.
PREP. during your ~ His parents divorced during his teens. | in your ~ All my children are in their teens. | since your ~ She's had skin problems since her teens.
You can also check other dicts: teens (English, 中文解释 ), wordnet sense, Collins Definition