userPronunciation: /ˈjuːzə/Translate user | into French | into German | into Italian | into Spanish Definition of user noun 1a person who uses or operates something: the user should press return and a message will be displayed a person who takes illegal drugs; an addict: a heroin user 2a person who exploits others:he was a gifted user of other people 3 [mass noun] Law the continued use or enjoyment of a right: any oral permission given within the prescription period would negative user as of rightuser in other Oxford dictionaries Definition of user in the US English dictionary