Source : Webster's Revised Unabridged Dictionary (1913)

Referee \Ref`er*ee"\ (-?), n.
   One to whom a thing is referred; a person to whom a matter in
   dispute has been referred, in order that he may settle it.

   Syn: Judge; arbitrator; umpire. See {Judge}.

Source : WordNet®

referee
     n 1: (sports) the chief official (as in boxing or American
          football) who is expected to ensure fair play [syn: {ref}]
     2: someone who reads manuscripts and judges their suitability
        for publication [syn: {reviewer}, {reader}]
     3: an attorney appointed by a court to investigate and report
        on a case
     v 1: be a referee or umpire in a sports competition [syn: {umpire}]
     2: evaluate professionally a colleague's work [syn: {peer
        review}]