"хаан" meaning in Mongol

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en mongol issus d’un mot en moyen mongol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en moyen mongol issus d’un mot en vieux turc",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en mongol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mongol",
      "orig": "mongol",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du moyen mongol ᠬᠠᠭᠠᠨ (qaɣan), du vieux turc 𐰴𐰍𐰣 (kağan)"
  ],
  "lang": "Mongol",
  "lang_code": "mn",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "Roi"
    },
    {
      "word": "prince"
    },
    {
      "word": "khan"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en mongol de l’histoire",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Empereur, khagan, qaghan, grand khan"
      ],
      "id": "fr-хаан-mn-noun-3PRREkod",
      "topics": [
        "history"
      ]
    }
  ],
  "sounds": [
    {
      "zh_pron": "khaan"
    }
  ],
  "word": "хаан"
}

{
  "categories": [
    "Mots en mongol issus d’un mot en moyen mongol",
    "Mots en moyen mongol issus d’un mot en vieux turc",
    "Noms communs en mongol",
    "mongol"
  ],
  "etymology_texts": [
    "Du moyen mongol ᠬᠠᠭᠠᠨ (qaɣan), du vieux turc 𐰴𐰍𐰣 (kağan)"
  ],
  "lang": "Mongol",
  "lang_code": "mn",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "Roi"
    },
    {
      "word": "prince"
    },
    {
      "word": "khan"
    }
  ],
  "senses": [
    {
      "categories": [
        "Lexique en mongol de l’histoire"
      ],
      "glosses": [
        "Empereur, khagan, qaghan, grand khan"
      ],
      "topics": [
        "history"
      ]
    }
  ],
  "sounds": [
    {
      "zh_pron": "khaan"
    }
  ],
  "word": "хаан"
}