Wiktionary
multiuser
a. (context computing telecommunications English) Having capabilities for serving many users simultaneously.
Usage examples of "multiuser".
The youngster was a MUDhead - he spent hours in the Multiuser Domain chat rooms on the Internet, excelling at role-playing games and active in creating and maintaining the fantasy societies so popular in the MUD realm.
Wendy could see that he was goofing on the self-images he was realtime mixing into the ceaseless global interactive multiuser stunglasses Show.
Its interface was the best money could build: a realspace-interactive multiuser quantum simulation that was, for almost any imaginable purpose, indistinguishable from the real thing.