(chiefly computing) Not helpful to users; difficult for an untrained person to use.

A manual intended to assist in the use of a particular system.

plural of character user interface

(computing, telecommunications) Of a operating system, etc., only capable of serving one user at a time, not many users simultaneously.

(informal, nonstandard) A citizen of the United States of America.

(euphemistic, archaic) A place in which to urinate and defecate: an outhouse; a lavatory.

(uncommon) Alternative form of usual offices: an outhouse or lavatory.

plural of end user license agreement

plural of usage share

plural of user guide