n. [ L., fr. arbitrari: cf. F. arbitrateur. ] 1. A person, or one of two or more persons, chosen by parties who have a controversy, to determine their differences. See Arbitration. [ 1913 Webster ]
2. One who has the power of deciding or prescribing without control; a ruler; a governor. [ 1913 Webster ]
Though Heaven be shut, And Heaven's high Arbitrators sit secure. Milton. [ 1913 Webster ]
Masters of their own terms and arbitrators of a peace. Addison. [ 1913 Webster ]
(n) someone chosen to judge and decide a disputed issue, Syn. arbitrator, umpire, Example:the critic was considered to be an arbiter of modern literature; the arbitrator's authority derived from the consent of the disputants; an umpire was appointed to settle the tax case