"bú" meaning in Czech

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "interjection"
      },
      "expansion": "bú",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Czech entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 10 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "cs",
          "name": "Animal sounds",
          "orig": "cs:Animal sounds",
          "parents": [
            "Sounds",
            "Vocalizations",
            "Sound",
            "Communication",
            "Energy",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "moo (sound of a cow)"
      ],
      "id": "en-bú-cs-intj-7g3c51vZ",
      "links": [
        [
          "moo",
          "moo"
        ]
      ],
      "related": [
        {
          "word": "bučet"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈbuː]"
    },
    {
      "audio": "Cs-bú.oga",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Cs-b%C3%BA.oga/Cs-b%C3%BA.oga.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f8/Cs-b%C3%BA.oga"
    }
  ],
  "word": "bú"
}

{
  "head_templates": [
    {
      "args": {
        "1": "cs",
        "2": "interjection"
      },
      "expansion": "bú",
      "name": "head"
    }
  ],
  "lang": "Czech",
  "lang_code": "cs",
  "pos": "intj",
  "related": [
    {
      "word": "bučet"
    }
  ],
  "senses": [
    {
      "categories": [
        "Czech entries with incorrect language header",
        "Czech interjections",
        "Czech lemmas",
        "Czech terms with IPA pronunciation",
        "Pages with 10 entries",
        "Pages with entries",
        "cs:Animal sounds"
      ],
      "glosses": [
        "moo (sound of a cow)"
      ],
      "links": [
        [
          "moo",
          "moo"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈbuː]"
    },
    {
      "audio": "Cs-bú.oga",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f8/Cs-b%C3%BA.oga/Cs-b%C3%BA.oga.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f8/Cs-b%C3%BA.oga"
    }
  ],
  "word": "bú"
}