"præface" meaning in French

{
  "forms": [
    {
      "form": "præfaces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "præface f (plural præfaces)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "préface"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "1628, Sébastien Roulliard, Melun ou l'Histoire de la Ville de Melun, page 137",
          "text": "Voila ce que contient en ſommaire, la præface de cette loy Salique:[…]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Obsolete form of préface."
      ],
      "id": "en-præface-fr-noun-0Du1ud5i",
      "links": [
        [
          "préface",
          "préface#French"
        ]
      ],
      "tags": [
        "alt-of",
        "feminine",
        "obsolete"
      ]
    }
  ],
  "word": "præface"
}

{
  "forms": [
    {
      "form": "præfaces",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "præface f (plural præfaces)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "préface"
        }
      ],
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French nouns",
        "French obsolete forms",
        "French terms spelled with Æ",
        "French terms with quotations",
        "Requests for translations of French quotations"
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "1628, Sébastien Roulliard, Melun ou l'Histoire de la Ville de Melun, page 137",
          "text": "Voila ce que contient en ſommaire, la præface de cette loy Salique:[…]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Obsolete form of préface."
      ],
      "links": [
        [
          "préface",
          "préface#French"
        ]
      ],
      "tags": [
        "alt-of",
        "feminine",
        "obsolete"
      ]
    }
  ],
  "word": "præface"
}