scannerPronunciation: /ˈskanə/Translate scanner | into French | into German | into Italian | into Spanish Definition of scanner noun a device for examining, reading, or monitoring something, in particular: Medicine a machine that examines the body through the use of radiation, ultrasound, or magnetic resonance imaging, as a diagnostic aid: a body scanner Electronics a device that scans documents and converts them into digital data. scanner in other Oxford dictionaries Definition of scanner in the US English dictionary