n.
Pronunciation: ' ə m- ˌ p ī (- ə )r
Function: noun
Etymology: Middle English oumpere, alteration (fr. misdivision of a noumpere ) of noumpere, from Anglo-French nounpier, nompere, from nounpier, adjective, single, odd, from non- + per equal, from Latin par
Date: 15th century
1 : one having authority to decide finally a controversy or question between parties: as a : one appointed to decide between arbitrators who have disagreed b : an impartial third party chosen to arbitrate disputes arising under the terms of a labor agreement
2 : an official in a sport who rules on plays
3 : a military officer who evaluates maneuvers