from The Century Dictionary.

  • noun Up to the mark; fully skilled or accomplished; expert; possessing or showing the readiness or skill of an adept: followed by at or in: as, he is quite au fait at the game.

from the GNU version of the Collaborative International Dictionary of English.

  • Expert; skillful; well instructed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Being familiar with or informed about something.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective being up to particular standard or level especially in being up to date in knowledge


from Wiktionary, Creative Commons Attribution/Share-Alike License

Borrowing from French au fait (literally "at fact").


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  • ...I do not doubt, Fats,

    that you are au fait

    with recent work by

    Rescher and Brandom

    on Realism...

    - Peter Reading, 5x5x5x5x5, 1983

    July 1, 2008

  • in the sense of being 'in touch'

    October 22, 2010