The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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

Bouvier's Law Dictionary, Revised 6th Ed (1856):

ADOLESCENCE, persons. That age which follows puberty and precedes the age of
majority; it commences for males at fourteen, and for females at twelve
years completed, and continues till twenty-one years complete.