teenager

noun

1. a person in his or her teens.

noun

1. a person between the ages of 13 and 19 inclusive

n.also teen ager, teen-ager; derived noun from teenage (q.v.), 1922. The earlier word for this was teener, attested in American English from 1894, and teen had been used as a noun to mean “teen-aged person” in 1818, though this was not common before 20c.