umpire
🇺🇸
/ˈʌmpaɪər/
🇬🇧
/ˈʌmpaɪə(r)/
Someone who watches a sport game and makes sure players follow the rules.
The umpire called a foul.
To be the one who makes sure the game is played fairly by following the rules.
Can you umpire our game this Saturday?