Source : Webster's Revised Unabridged Dictionary (1913)

Adolescence \Ad`o*les"cence\, n. [Fr., fr. L. adolescentia.]
   The state of growing up from childhood to manhood or
   womanhood; youth, or the period of life between puberty and
   maturity, generally considered to be, in the male sex, from
   fourteen to twenty-one. Sometimes used with reference to the
   lower animals.

Source : WordNet®

adolescence
     n 1: the time period between the beginning of puberty and
          adulthood
     2: in the state that someone is in between puberty and
        adulthood