Game Master

[ geym mas-ter, mah-ster ]

noun

1. Games. : GM
   1. the person who organizes or directs the story or play in a tabletop game, as a role-playing game. Compare Dungeon Master.
   2. (in an MMORPG ) an employee representative of the game developer who maintains a presence in the online game and may be called by players to resolve technical issues, enforce terms of service, etc.:

      If someone is being abusive or harassing you, just report him to a Game Master.

Word History and Origins

Origin of Game Master¹

First recorded in 2000–05

Example Sentences

And that gets to the heart of what makes the game so incredible: By staying silent, it turns the player into the game master.

From The Daily Beast