arbitrator

Từ điển American Heritage Dictionary 4th

ar·bi·tra·tor (ärʹbĭ-trā'tər)n.
1. A person chosen to settle the issue between parties engaged in a dispute. See Synonyms at judge.
2. One having the ability or power to make authoritative decisions; an arbiter.

• Từ đồng nghĩa / Synonyms:
  arbiter, umpire