Source : Webster's Revised Unabridged Dictionary (1913)

Newcomer \New"com`er\, n.
   One who has lately come.

Source : WordNet®

newcomer
     n 1: any new participant in some activity [syn: {fledgling}, {fledgeling},
           {starter}, {neophyte}, {freshman}, {newbie}, {entrant}]
     2: a recent arrival; "he's a newcomer to Boston"