umpire
nounUK /ˈʌm.paɪər/
US /ˈʌm.paɪr/
An umpire is the person who makes sure everyone follows the rules in a game.
The umpire called the runner safe at home plate.
OTHER MEANINGS
2. A person chosen to settle a disagreement between two sides.
They asked a retired teacher to act as umpire in their dispute.
3. To act as the official who enforces the rules of a game.
She umpired the softball game on Saturday.
4. To make a final decision about something in dispute.
The committee will umpire the matter next week.