gamemaster
nounUK /ˈɡeɪmˌmɑːstə/
US /ˈɡeɪmˌmæstər/
A gamemaster is the person who runs a game and helps everyone play.
The gamemaster rolled the dice and told us what happened next.
RELATED WORDS
OTHER MEANINGS
2. A person who organizes and judges a competition or contest.
The gamemaster announced the winner of the puzzle contest.
3. A player who controls the story and non-player characters in a role-playing game.
As gamemaster, she created a whole world full of monsters and treasure.
4. A person in charge of running an online multiplayer game session.
The gamemaster restarted the server when the game froze.