Source : Webster's Revised Unabridged Dictionary (1913)

Adolescent \Ad`o*les"cent\ ([a^]d`[-o]*l[e^]s"sent), a. [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.

Adolescent \Ad`o*les"cent\, n.
   A youth.

Source : WordNet®

adolescent
     adj 1: relating to or peculiar to or suggestive of an adolescent;
            "adolescent problems"
     2: being of the age 13 through 19; "teenage mothers"; "the teen
        years" [syn: {teen}, {teenage}, {teenaged}]
     3: displaying or suggesting a lack of maturity; "adolescent
        insecurity"; "jejune responses to our problems"; "their
        behavior was juvenile"; "puerile jokes" [syn: {jejune}, {juvenile},
         {puerile}]
     4: in the state of development between puberty and maturity;
        "adolescent boys and girls"
     n : a juvenile between the onset of puberty and maturity [syn: {stripling},
          {teenager}]