faxfax1 /fæks/ noun [countableC]OFFICE1a written document that is sent in electronic form down a telephone line and then printed using a special machineCould you send this fax for me?
2 (also fax machine) a machine used for sending and receiving faxesHis home office is equipped with a PC, fax and photocopier.
I sent the details by fax.
What’s your fax number?