Definition of "scanner"

scanner

/ˈskænɚ/

noun
plural scanners
1. A device which scans documents in order to convert them to a digital medium.
2. A radio receiver which iterates through a sequence of frequencies to detect signal.
3. A device which uses radiation (ultrasound, X-ray, etc.) to generate images of tissue or surfaces for diagnostic purposes.
  Quotations
  Chorban: I'm using a small scanner to gather readings on the keepers.Chorban: So far, I've had mixed results. I find it difficult to get near the creatures.
  2008, BioWare, Mass Effect (Science Fiction), Redwood City: Electronic Arts, PC, scene: Citadel
4. A device which uses optics to detect printed data (such as a barcode).
5. One who scans.