What does scanner mean?
A scanner is a device or system that examines something and captures information in a useful form. In an office, the word usually means a machine that converts a printed document or photograph into a digital image. In retail and industry, it may refer to equipment that reads barcodes, labels, or other coded information. In computing, “scanner” can mean a program that searches files or networks for viruses, unauthorized access, or particular patterns. The word can also describe a person: a security scanner checks visitors and belongings, while an archaeological or survey scanner searches an area systematically. In general, the term implies methodical examination and the conversion or detection of information rather than casual observation.
A device that converts images, documents, barcodes, or other physical information into a digital or otherwise measurable form.
"The scanner produced a clear digital image of the old photograph."
The type of scanner is often specified, as in “document scanner,” “barcode scanner,” or “flatbed scanner.”
A person or piece of software that systematically examines information, locations, or computer systems for particular findings.
"The scanner identified several security weaknesses in the network."
In computing, this use commonly refers to malware-detection or network-analysis software.
Use the plural when referring to more than one scanning device, person, or software tool.
"The warehouse workers moved the scanners between the packing stations."
A scanner turns the physical world into data: it can turn a printed page into a digital image or turn a shopping barcode into a price lookup.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does scanner come from?
“Scanner” was formed in the early 19th century from the verb “scan,” meaning to examine or investigate closely, with the suffix “-er” indicating a person or device that performs the action. The verb “scan” derives from an earlier English word associated with the scanning of woven cloth or thread, although the exact historical development is difficult to trace with certainty. The mechanical sense developed as scanning devices became common in photography, telegraphy, and later office technology.
Related word forms
How scanner is actually used
In computing, “scanner” commonly refers to both hardware that digitizes images or documents and software that checks for security threats. As a person, it often suggests someone who examines places, records, or information methodically.