"třo" meaning in Upper Sorbian

{
  "head_templates": [
    {
      "args": {
        "1": "hsb",
        "2": "numeral"
      },
      "expansion": "třo",
      "name": "head"
    }
  ],
  "lang": "Upper Sorbian",
  "lang_code": "hsb",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "name": "Upper Sorbian cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Upper Sorbian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "three (3)"
      ],
      "id": "en-třo-hsb-num-5Asrj~fW",
      "links": [
        [
          "three",
          "three"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡sʲɔ]"
    }
  ],
  "word": "třo"
}

{
  "head_templates": [
    {
      "args": {
        "1": "hsb",
        "2": "numeral"
      },
      "expansion": "třo",
      "name": "head"
    }
  ],
  "lang": "Upper Sorbian",
  "lang_code": "hsb",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Upper Sorbian cardinal numbers",
        "Upper Sorbian entries with incorrect language header",
        "Upper Sorbian lemmas",
        "Upper Sorbian numerals",
        "Upper Sorbian terms with IPA pronunciation"
      ],
      "glosses": [
        "three (3)"
      ],
      "links": [
        [
          "three",
          "three"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[t͡sʲɔ]"
    }
  ],
  "word": "třo"
}