The Collaborative International Dictionary of English v.0.48:

Entrant \En"trant\, n. [See Entrance, n.]
   1. One who enters; a beginner. "The entrant upon life." --Bp.
      Terrot.
      [1913 Webster]

   2. An applicant for admission. --Stormonth.
      [1913 Webster]

WordNet (r) 3.0 (2006):

entrant
    n 1: a commodity that enters competition with established
         merchandise; "a well publicized entrant is the pocket
         computer"
    2: any new participant in some activity [syn: newcomer,
       fledgling, fledgeling, starter, neophyte, freshman,
       newbie, entrant]
    3: someone who enters; "new entrants to the country must go
       though immigration procedures"
    4: one who enters a competition