Definition of au fait adjective from the Oxford Advanced Learner's Dictionary


au fait

BrE BrE//ˌəʊ ˈfeɪ//
; NAmE NAmE//ˌoʊ ˈfeɪ//
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[not before noun] au fait (with something) (from French) completely familiar with something I'm new here so I'm not completely au fait with the system. Word Originmid 18th cent.: from French, literally ‘to the fact, to the point’.
See the Oxford Advanced American Dictionary entry: au fait