What does adolescent mean?
The definition of adolescent
Ad`o*les”cent, a.
Etym: [L. adolescens, p. pr. of adolescere to grow up to; ad + the inchoative olescere to grow: cf. F. adolescent. See Adult.]

Growing; advancing from childhood to maturity. Schools, unless discipline were doubly strong, Detain their adolescent charge too long. Cowper.

Ad`o*les”cent, n.
A youth.