From Longman Dictionary of Contemporary EnglishCeefaxCee‧fax /ˈsiːfæks/ noun [uncountable] TCB trademark a written information service broadcast by the BBC on televisions in Britain from 1974 until 2012
Examples from the Corpus
Ceefax• For rest of us, it's Radio 3 and the highlights, with a quick dose of Ceefax in the morning.• Using Prestel, Ceefax and other technological information systems demands a new set of location skills. 