1. (n.) A person to whose sole decision a controversy or question between parties is referred; especially, one chosen to see that the rules of a game, as cricket, baseball, or the like, are strictly observed.

2. (n.) A third person, who is to decide a controversy or question submitted to arbitrators in case of their disagreement.

3. (v. t.) To decide as umpire; to arbitrate; to settle, as a dispute.

4. (v. t.) To perform the duties of umpire in or for; as, to umpire a game.

5. (v. i.) To act as umpire or arbitrator.

JP Justice act between adjudge adjudicate adjudicator arbiter arbitrate arbitrator bargain bencher critic go between hear his honor his lordship his worship hold court hold the scales impartial arbitrator indicator intercede intermediate interpose intervene judge judger justice magistrate make terms mediate meet halfway moderate moderator negotiate official officiate referee represent sit in judgment step in third party treat with try ump unbiased observer