scanner

[skan-er]

noun

1. a person or thing that scans.

2. Also called optical reader. Also called optical scanner. Computers.,  a device that scans printed, handwritten, barcode, or other visual data and encodes it into digital format.

3. Photography.,  any device for exposing an image on film, a sensitized plate, etc., by tracing light along a series of many closely spaced parallel lines.

4. (in aerial photography) a device for estimating the ratio of aircraft speed to aircraft altitude.

5. a photoelectric device for scanning a picture to determine automatically the density of the hue or value in each area for transmission by wire or radio or for preparation of color process printing plates.

6. a computer-aided electronic system using photoelectric cells to separate copy, as color illustrations, into its primary colors, correct color copy, and produce a set of color separations ready for proofing or printing.

7. Radio.,  a radio receiver, used especially by police, firefighters, and the press, that continuously tunes to preselected frequencies, broadcasting any signal that it detects.

8. Medicine/Medical, Biology.,  a device for examining a body, organ, tissue, or other biologically active material.

scanner

/ ˈskænə /

noun

1. a person or thing that scans

2. a device, usually electronic, used to measure or sample the distribution of some quantity or condition in a particular system, region, or area

3. an aerial or similar device designed to transmit or receive signals, esp radar signals, inside a given solid angle of space, thus allowing a particular region to be scanned

4. any of various devices used in medical diagnosis to obtain an image of an internal organ or part See CAT scanner nuclear magnetic resonance scanner ultrasound scanner

5. informal,  a television outside broadcast vehicle

6. short for optical scanner

7. printing an electronic device which scans printed material and converts it to digital form

Word History and Origins

Origin of scanner¹

First recorded in 1550–60; scan + -er ¹

Example Sentences

Dr Michael Andersen, a consultant radiologist and associate professor at the hospital, shows off a high-tech scanner, only the fourth of its kind used by any hospital around the world.

From BBC

There have also been several cases in the US recently of alleged espionage by Chinese nationals, and scientists in particular have come under the scanner.

From BBC

Extra security measures were put in place, including airport-style scanners outside Ashe, which caused huge queues for fans and pushed the match back.

From BBC

"The scanner will enable shoppers to choose the avocado that is right for them and which therefore can help them plan their usage and desired shelf life," says Ms Lawrence.

From BBC

Airport security scanners have been installed in some office entrances.

From BBC