WordNet (r) 3.0 (2006):

fax
    n 1: duplicator that transmits the copy by wire or radio [syn:
         facsimile, facsimile machine, fax]
    v 1: send something via a facsimile machine; "Can you fax me the
         report right away?" [syn: fax, telefax, facsimile]

The Free On-line Dictionary of Computing (30 December 2018):

facsimile
fax

    ("fax") A process by which fixed graphic
   material including pictures, text, or images is scanned and
   the information converted into electrical signals which are
   transmitted via telephone to produce a paper copy of the
   graphics on the receiving fax machine.

   Some modems can be used to send and receive fax data.  V.27
   ter and V.29 protocols are used.

   [Details?  Standards?]

   (2004-07-26)