Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun arbitrator
1 sense of arbitrator
Sense 1
arbiter, arbitrator, umpire -- (someone chosen to judge and decide a disputed issue; "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")
=> evaluator, judge -- (an authority who is able to estimate worth or quality)