Definition of au fait in English:

au fait

Pronunciation /əʊ ˈfeɪ/ /o ˈfɛ(t)/

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.’
    • ‘He might not be au fait with some of the finer points of galactic science.’
    • ‘I'm not au fait with the camera—mine has a digital live view so what you see is what you get.’
    • ‘The bartenders who are remarkably au fait with the menu's cognacs and champagnes.’
    • ‘She has sought to show herself au fait with social media, holding a YouTube interview.’
    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)/