Definitions
1.nounA device which scans documents in order to convert them to a digital medium."He put the picture in the scanner, then e-mailed a copy of it to his family."
2.nounA radio receiver which iterates through a sequence of frequencies to detect signal.
3.nounA device which uses radiation (ultrasound, X-ray, etc.) to generate images of tissue or surfaces for diagnostic purposes.
4.nounA device which uses optics to detect printed data (such as a barcode).
5.nounOne who scans.