/ˈʌm.paɪərd/
VERB
To serve as an official in a sporting event by supervising play, enforcing the rules, and ensuring fair competition.
To supervise a sporting contest as an official, monitor the players, and enforce the rules of the game.
VERB
To make an official judgment or ruling on a play, question, or dispute while acting as an impartial authority.
To evaluate a situation, consider opposing views, and reach an authoritative decision or ruling.