"буу" meaning in Mongol

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en mongol issus d’un mot en chinois",
      "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 chinois 炮, pào (« canon »)."
  ],
  "lang": "Mongol",
  "lang_code": "mn",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "ᠪᠤᠤ, buu"
  ],
  "senses": [
    {
      "glosses": [
        "Pistolet, fusil."
      ],
      "id": "fr-буу-mn-noun-jAEreITU"
    }
  ],
  "word": "буу"
}

{
  "categories": [
    "Mots en mongol issus d’un mot en chinois",
    "Noms communs en mongol",
    "mongol"
  ],
  "etymology_texts": [
    "Du chinois 炮, pào (« canon »)."
  ],
  "lang": "Mongol",
  "lang_code": "mn",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "ᠪᠤᠤ, buu"
  ],
  "senses": [
    {
      "glosses": [
        "Pistolet, fusil."
      ]
    }
  ],
  "word": "буу"
}