multiuser Syllabification: (mul·ti·us·er)Pronunciation: /ˈməltēˈyo͞ozər, ˈməltī-/Definition of multiuser adjective [attributive] (of a computer system) able to be used by a number of people simultaneously. denoting a computer game in which several players interact simultaneously using the Internet or other communications. multiuser in other Oxford dictionaries Definition of multiuser in the British & World English dictionary