"fol" meaning in French

{
  "head_templates": [
    {
      "args": {
        "1": "fr",
        "2": "adjective form"
      },
      "expansion": "fol",
      "name": "head"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "used only when the following noun starts with a vowel or mute h",
          "word": "fou"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "_dis": "4 3 1 10 3 2 1 2 2 4 1 1 1 1 4 1 1 6 7 9 5 6 11 1 13 1",
          "kind": "other",
          "name": "West Frisian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Alternative form of fou (used only when the following noun starts with a vowel or mute h)"
      ],
      "id": "en-fol-fr-adj-OeDl9V3U",
      "links": [
        [
          "fou",
          "fou#French"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/fɔl/"
    }
  ],
  "word": "fol"
}

{
  "categories": [
    "West Frisian adjectives",
    "West Frisian entries with incorrect language header",
    "West Frisian lemmas"
  ],
  "head_templates": [
    {
      "args": {
        "1": "fr",
        "2": "adjective form"
      },
      "expansion": "fol",
      "name": "head"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "used only when the following noun starts with a vowel or mute h",
          "word": "fou"
        }
      ],
      "categories": [
        "French 1-syllable words",
        "French adjective forms",
        "French entries with incorrect language header",
        "French non-lemma forms",
        "French terms with IPA pronunciation"
      ],
      "glosses": [
        "Alternative form of fou (used only when the following noun starts with a vowel or mute h)"
      ],
      "links": [
        [
          "fou",
          "fou#French"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/fɔl/"
    }
  ],
  "word": "fol"
}