Scanner (noun)

1. An electronic device that scans a document or image and converts it into a digital format.
2. A machine that reads and converts a document or image into a digital format.
3. A device that reads barcodes or QR codes.

Origin:

From middle english scannere, from old english scannere, from late latin scannus ("a measuring rod"), from latin scandere ("to climb").

Examples:

1. She used a scanner to digitize her old photographs.
2. He scanned the document into the computer using the scanner.
3. She used a barcode scanner to check prices at the store.
4. The scanner at the airport checks the passengers' boarding pass.
5. He was using the scanner to check the patient's brain activity.