(n.) A person to whom a matter is referred for judgment; an official in a sporting event\.

JP Justice act between adjudge adjudicate 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 officiate represent sit in judgment step in third party treat with try umpire unbiased observer