1 a device for examining sth or recording sth using beams of light sound or X-RAYS:
The identity cards are examined by an electronic scanner. * a document scanner (= that stores the contents of a document on a computer)
2 a machine used by doctors to produce a picture of the inside of a person's body on a computer screen:
a body scanner * an ultrasound / X-ray scanner
3 a piece of equipment for receiving and sending RADAR signals
\
