adjudicator

1 a person who impartially decides or resolves a dispute or controversy <since they seemed to be in a hopeless stalemate, both labor and management agreed to use an independent adjudicator to decide the terms of the contract> Synonyms judge, arbiter, arbitrator, referee, umpireRelated Words jurist, justice, magistrate; intermediary, intermediate, mediator, mediatrix, moderator, negotiator; conciliator, go-between, peacemaker, reconciler, troubleshooter; decider

2 a public official having authority to decide questions of law <the appellate court refused to hear the case, thus allowing the judgment of previous adjudicators to stand> Synonyms judge, beak [chiefly British], bench, court, jurist, justice, magistrateRelated Words chief justice, circuit judge, justice of the peace, squire; auditor, master; jurisconsult, jurisprudent