Definition of multi user dungeon in English English dictionary
A text-based command line online game in which players may jointly engage in role-playing. MUDs are a precursor to the massively multiplayer online game
(Bilgisayar) In computer gaming, a MUD (Multi-User Dungeon, Domain or Dimension) is a multi-player computer game that combines elements of role-playing games, hack and slash style computer games and social chat rooms