Definition of au fait in English:

au fait

adjective

au fait with
  • Having a good or detailed knowledge of.

    ‘you should be au fait with the company and its products’
    • ‘Engineers in all sectors of industry must be completely au fait with the state of the art.’
    • ‘For those of you not quite au fait with Surrealist parlour games, the term ‘exquisite corpse’ originates from the game more commonly known as Consequences.’
    familiar, acquainted, conversant, at home, up to date, up with, in touch
    View synonyms

Origin

Mid 18th century: from French, literally ‘to the fact, to the point’.

Pronunciation

au fait

/əʊ ˈfeɪ//o ˈfɛ(t)/