Arbiter

n. [Lat. arbiter, Fr. & Pr. arbitre.] 1. (Law.) A person appointed, or chosen, by parties in controversy, to decide their differences. In modern usage, arbitrator is the technical word. 2. Any person who has the power of judging and determining, without control; one whose power of deciding and governing is not limited. Cooper. For Jove is arbiter of both to man. Cooper. Syn.—Arbitrator; umpire; controller; ruler; governor.