Dictionary of Computer and Internet Terms: MUD (multi-user domain ormulti-user dimension, formerlymulti-user dungeon)
MUD (multi-user domain ormulti-user dimension, formerlymulti-user dungeon)
a type of real-time Internet conference in which users not only talk to each other, but also move around and manipulate objects in an imaginary world.
Originally conceived as multi-user adventure game, MUDs have developed into a promising format for collaboration and education through the Internet. To access a MUD, the user must, in general, Telnet to the computer that hosts it. Compare IRC.

