"au fait" meaning in French

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  "lang": "French",
  "lang_code": "fr",
  "pos": "adj",
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      "examples": [
        {
          "english": "Are you au fait with the rules of the game?",
          "text": "Êtes-vous au fait des règles du jeu ?",
          "type": "example"
        }
      ],
      "glosses": [
        "au fait"
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        [
          "au fait",
          "au fait#English"
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      "raw_glosses": [
        "au fait [with de ‘with’]"
      ],
      "related": [
        {
          "word": "au courant de"
        }
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      "ipa": "/o fɛt/"
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  "word": "au fait"
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      "args": {},
      "expansion": "au fait",
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  "lang": "French",
  "lang_code": "fr",
  "pos": "adv",
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          "_dis": "34 17 49",
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      "examples": [
        {
          "english": "By the way, where do you come from?",
          "text": "Au fait, d’où viens-tu ?",
          "type": "example"
        },
        {
          "english": "By the way, have a doctor's appointment at eleven, so I'm actually going to be late to your house.",
          "text": "Au fait, j’ai rendez-vous chez le médecin à onze heures, donc en fait je vais arriver en retard chez toi .",
          "type": "example"
        }
      ],
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        "by the way"
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  "word": "au fait"
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      "expansion": "au fait (invariable)",
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  "lang": "French",
  "lang_code": "fr",
  "pos": "adj",
  "related": [
    {
      "word": "au courant de"
    }
  ],
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    {
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      "examples": [
        {
          "english": "Are you au fait with the rules of the game?",
          "text": "Êtes-vous au fait des règles du jeu ?",
          "type": "example"
        }
      ],
      "glosses": [
        "au fait"
      ],
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          "au fait",
          "au fait#English"
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        "au fait [with de ‘with’]"
      ],
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      "ipa": "/o fɛt/"
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  "word": "au fait"
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  "head_templates": [
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  "lang_code": "fr",
  "pos": "adv",
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        {
          "english": "By the way, where do you come from?",
          "text": "Au fait, d’où viens-tu ?",
          "type": "example"
        },
        {
          "english": "By the way, have a doctor's appointment at eleven, so I'm actually going to be late to your house.",
          "text": "Au fait, j’ai rendez-vous chez le médecin à onze heures, donc en fait je vais arriver en retard chez toi .",
          "type": "example"
        }
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        "by the way"
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  "word": "au fait"
}