noun
teens
TEENZ/tiːnz/
The numbers from thirteen through nineteen.
The students' ages fall in the teens.

Etymology
The number ending identifies the ages thirteen through nineteen. Teens names that span of years and, in this sense, the people whose ages fall within it.
In context
not a question of whether teens are having sex by 12th grade sixty-five percent of high school students will have engaged in sexual intercourse
More examples
- Mia can count through the teens without any help.
- Her score stays in the teens for most of the game.
- The page numbers in the teens are missing from this book.
Forms
teens