Referees

noun

1. An umpire or judge; an official who makes sure the rules are followed during a game.

   "The referee kicked Jim out of the game for fighting."

2. A person who settles a dispute.
3. A person who writes a letter of reference or provides a reference by phone call for someone.

   "Your application, along with letters from three referees, should be received by January 31."

4. An expert who judges the manuscript of an article or book to decide if it should be published.