"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"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "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": "quote"
        }
      ],
      "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",
        "Pages with 2 entries",
        "Requests for translations of French quotations"
      ],
      "examples": [
        {
          "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": "quote"
        }
      ],
      "glosses": [
        "Obsolete form of préface."
      ],
      "links": [
        [
          "préface",
          "préface#French"
        ]
      ],
      "tags": [
        "alt-of",
        "feminine",
        "obsolete"
      ]
    }
  ],
  "word": "præface"
}