Computer Dictionary of Information Technology

Massively Multiplayer Online Game

(MMOG, MMO) Any game that allows dozens, hundreds or even thousands of players to interact with a game via the Internet. Typically the game runs on a central server farm and players access it via a personal computer, game console or mobile phone. The most popular genre is the Massively Multiplayer Online Role Playing Game (MMORPG), of which World of Warcraft is probably the most popular example.

Note that an MMOG is not necessarily a _massive_ game (though often they are based in large, complex worlds), their distinguishing characteristic is the number of players.