"grand-duc" meaning in French

{
  "descendants": [
    {
      "lang": "Arabic",
      "lang_code": "ar",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "ḡrāndūq",
      "word": "غْرَانْدُوق"
    },
    {
      "lang": "English",
      "lang_code": "en",
      "raw_tags": [
        "borrowed"
      ],
      "word": "grand-duc"
    },
    {
      "lang": "Iranian Persian",
      "lang_code": "fa-ira",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "gerânduk",
      "word": "گِرانْدوک"
    },
    {
      "lang": "Turkish",
      "lang_code": "tr",
      "raw_tags": [
        "borrowed"
      ],
      "word": "grandük"
    }
  ],
  "forms": [
    {
      "form": "grands-ducs",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "grande-duchesse",
      "tags": [
        "feminine"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "grands-ducs",
        "f": "grande-duchesse"
      },
      "expansion": "grand-duc m (plural grands-ducs, feminine grande-duchesse)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "90 10",
          "kind": "other",
          "langcode": "fr",
          "name": "Nobility",
          "orig": "fr:Nobility",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "to paint the town red",
          "text": "faire la tournée des grands-ducs",
          "translation": "to paint the town red",
          "type": "example"
        }
      ],
      "glosses": [
        "grand duke"
      ],
      "id": "en-grand-duc-fr-noun-ohTIjvHR",
      "links": [
        [
          "grand duke",
          "grand duke"
        ]
      ],
      "tags": [
        "masculine"
      ]
    },
    {
      "categories": [
        {
          "_dis": "21 79",
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "22 78",
          "kind": "other",
          "langcode": "fr",
          "name": "Owls",
          "orig": "fr:Owls",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "english": "great horned owl",
          "text": "grand-duc d'Amérique",
          "translation": "great horned owl",
          "type": "example"
        },
        {
          "english": "Eurasian eagle owl",
          "text": "grand-duc d'Europe",
          "translation": "Eurasian eagle owl",
          "type": "example"
        },
        {
          "english": "Eurasian eagle owl",
          "text": "hibou grand-duc",
          "translation": "Eurasian eagle owl",
          "type": "example"
        }
      ],
      "glosses": [
        "Eurasian eagle-owl"
      ],
      "id": "en-grand-duc-fr-noun-baBI3zgp",
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɡʁɑ̃.dyk/"
    }
  ],
  "word": "grand-duc"
}

{
  "categories": [
    "French 2-syllable words",
    "French countable nouns",
    "French entries with incorrect language header",
    "French lemmas",
    "French masculine nouns",
    "French multiword terms",
    "French nouns",
    "French terms with IPA pronunciation",
    "Pages with 2 entries",
    "Pages with entries",
    "fr:Nobility",
    "fr:Owls"
  ],
  "descendants": [
    {
      "lang": "Arabic",
      "lang_code": "ar",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "ḡrāndūq",
      "word": "غْرَانْدُوق"
    },
    {
      "lang": "English",
      "lang_code": "en",
      "raw_tags": [
        "borrowed"
      ],
      "word": "grand-duc"
    },
    {
      "lang": "Iranian Persian",
      "lang_code": "fa-ira",
      "raw_tags": [
        "borrowed"
      ],
      "roman": "gerânduk",
      "word": "گِرانْدوک"
    },
    {
      "lang": "Turkish",
      "lang_code": "tr",
      "raw_tags": [
        "borrowed"
      ],
      "word": "grandük"
    }
  ],
  "forms": [
    {
      "form": "grands-ducs",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "grande-duchesse",
      "tags": [
        "feminine"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "grands-ducs",
        "f": "grande-duchesse"
      },
      "expansion": "grand-duc m (plural grands-ducs, feminine grande-duchesse)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French terms with usage examples"
      ],
      "examples": [
        {
          "english": "to paint the town red",
          "text": "faire la tournée des grands-ducs",
          "translation": "to paint the town red",
          "type": "example"
        }
      ],
      "glosses": [
        "grand duke"
      ],
      "links": [
        [
          "grand duke",
          "grand duke"
        ]
      ],
      "tags": [
        "masculine"
      ]
    },
    {
      "categories": [
        "Entries missing English vernacular names of taxa",
        "French terms with usage examples"
      ],
      "examples": [
        {
          "english": "great horned owl",
          "text": "grand-duc d'Amérique",
          "translation": "great horned owl",
          "type": "example"
        },
        {
          "english": "Eurasian eagle owl",
          "text": "grand-duc d'Europe",
          "translation": "Eurasian eagle owl",
          "type": "example"
        },
        {
          "english": "Eurasian eagle owl",
          "text": "hibou grand-duc",
          "translation": "Eurasian eagle owl",
          "type": "example"
        }
      ],
      "glosses": [
        "Eurasian eagle-owl"
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɡʁɑ̃.dyk/"
    }
  ],
  "word": "grand-duc"
}