An authority on manners or etiquette.
A match official on the ground deciding and enforcing the rules during play. As of 2007 the Australian Football League uses three; in the past there were two or just one. The other officials, the goal umpires and boundary umpires, are usually referred to by those phrases.
One of the two white-coated officials who preside over a cricket match.
The official who presides over a tennis match sat on a high chair.
One of the officials who preside over a baseball game.
The official who stands behind the line on the defensive side or next to the referee on the offensive side.
A person who arbitrates between contending parties.
The official who presides over a curling game.
To act as an umpire in a game.
To decide as an umpire.