From Longman Dictionary of Contemporary Englishscannerscan‧ner /ˈskænə $ -ər/ ●●○ noun [countable] 1 
TEEa machine that passes an electrical beam over something in order to produce a picture of what is inside it → scan a high-tech body scanner2 TDa piece of computer equipment that allows written or printed information to be taken onto a computer and stored there → scan
TEEa machine that passes an electrical beam over something in order to produce a picture of what is inside it → scan a high-tech body scanner2 TDa piece of computer equipment that allows written or printed information to be taken onto a computer and stored there → scanExamples from the Corpus
scanner• scanners for medical use• The developer hopes it would link with the existing Magnetic Imaging Centre, which already operates a sophisticated body scanner.• The original contracts included a commitment to update body scanners free of charge.• The company also will demonstrate a new keyboard aimed at the home market that incorporates a built-in paper scanner.• One is a single-sheet paper scanner built into a keyboard.• Later, Fornek reported on his efforts to question Gingrich about the taped conversation that was picked up on a police scanner.• The tape was made by people who intercepted a cellular telephone transmission with a police scanner.• This time Karen was in front of the scanner.• This scanner looks for trigger points.From Longman Business Dictionaryscannerscan‧ner /ˈskænə-ər/ noun [countable]COMMERCE1a machine that passes an electronic BEAM over something in order to read information on it or produce a picture of what is insideCustomers simply have to wave the product’s bar code under a scanner.credit-card scanners2a piece of computer equipment that copies words or images from paper onto the computerThe store sells color printers and scanners for desk-top publishing. → price scanner 