Umpire (baseball)
PERSON CHARGED WITH OFFICIATING A BASEBALL GAME
Baseball umpire; Umpire-in-chief; Umpire positions (baseball); Base umpire; Baseball ump; Plate umpire; Home plate umpire; Outfield umpire; First base umpire; Second base umpire; Third base umpire; Left field umpire; Right field umpire
In baseball, the umpire is the person charged with officiating the game, including beginning and ending the game, enforcing the rules of the game and the grounds, making judgment calls on plays, and handling the disciplinary actions. The term is often shortened to the colloquial form ump.