Dungeon Master - Definition and Overview

• The primary sense of Dungeon Master (or dungeonmaster or DM) is the organizer of a role-playing game. The title was invented for an organizer/referee of TSR's Dungeons & Dragons RPG, and was introduced into the second supplement to the game rules (Blackmoor). To avoid infringement of TSR's copyrights, and to describe referees in role-playing genres other than sword 'n' sorcery, other gaming companies used the more generic term gamemaster.
• Dungeon Master by FTL was the first 3D realtime action role playing computer game.
• On occasion, Dungeon Master might be used within the BDSM community or fiction to describe the owner or master of a BDSM dungeon a place more or less equipped and decorated for the playing out of BDSM sexual fantasies.