Fax (noun)

1. A system for sending copies of documents, especially over telephone lines, by means of a machine that scans the original, encodes the information into a signal, and reproduces a copy at the receiving end.
2. A document sent in this way.

Origin:

1970s: short for facsimile.

Examples:

1. He sent the document by fax.
2. The office has a fax machine.
3. I need to fax this document to the client.
4. I received a fax from my lawyer.
5. The company's fax number is 555-1234.