Umpire n. : A person to whose sole decision a controversy or question between parties is referred; especially, one chosen to see that the rules of a game, as cricket, baseball, or the like, are strictly observed.

Umpire n. : A third person, who is to decide a controversy or question submitted to arbitrators in case of their disagreement.

Umpire v. t. : To decide as umpire; to arbitrate; to settle, as a dispute.

Umpire v. t. : To perform the duties of umpire in or for; as, to umpire a game.

Umpire v. i. : To act as umpire or arbitrator.

Example:
How do I get certified to Umpire high school baseball in NY?

Taxonomy
runner, ABUA, ball, infielder, umpire, rule, first base, NCAA, game, batted ball, PHP-Nuke, geek, free software, NFHS, Rule Books, amateur baseball umpires, Score, The Pitcher.

Defination from the web:
umpires. ... Like most batter-runners in this situation, Teixeira slowed down to communicate the violation with the umpire, but to his credit he kept running. ...