Pronunciation: (um'pīur), [key]
—n., v., -pired, -pir•ing.
1. a person selected to rule on the plays in a game.
2. one selected to settle disputes about the application of settled rules or usages; a person agreed on by disputing parties to arbitrate their differences.
1. to act as umpire in (a game).
2. to decide or settle (a controversy, dispute, or the like) as umpire; arbitrate.
to act as umpire.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.