telefax Syllabification: (tel·e·fax)Pronunciation: /ˈteləˌfaks/ trademarkDefinition of telefax noun the transmission of documents by fax:for more information contact us by telefax a document sent by fax. a fax machine. verb [with object] (usually as adjective telefaxed) send (a message) by fax:telefaxed bills of ladingOrigin: 1940s: abbreviation of telefacsimiletelefax in other Oxford dictionaries Definition of telefax in the British & World English dictionary