Source : Webster's Revised Unabridged Dictionary (1913)

Youngster \Young"ster\, n.
   A young person; a youngling; a lad. [Colloq.] ``He felt
   himself quite a youngster, with a long life before him.''
   --G. Eliot.

Source : WordNet®

youngster
     n : a young person of either sex; "she writes books for
         children"; "they're just kids"; "`tiddler' is a British
         term for youngsters" [syn: {child}, {kid}, {minor}, {shaver},
          {nipper}, {small fry}, {tiddler}, {tike}, {tyke}, {fry},
          {nestling}]