Definition of "arbitrator" []

• A person chosen to settle the issue between parties engaged in a dispute. See Synonyms at judge. (noun)
• One having the ability or power to make authoritative decisions; an arbiter. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The arbitrator is getting impatient and cuts you off."
• "The arbitrator simply ruled that, compared to the punishment meted out to the others, Way's was too severe, and the arbitrator is right."
• "Why else do you think the arbitrator is holding off on a decision on that subject?"