"quatuor" meaning in Latin

{
  "lang": "Latin",
  "lang_code": "la",
  "pos": "num",
  "senses": [
    {
      "alt_of": [
        {
          "word": "quattuor"
        }
      ],
      "categories": [
        {
          "kind": "topical",
          "name": "Latin cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin medieval spellings",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "medieval spelling of quattuor"
      ],
      "id": "en-quatuor-la-num-yF8seA8g",
      "links": [
        [
          "quattuor",
          "quattuor#Latin"
        ]
      ],
      "tags": [
        "alt-of",
        "indeclinable",
        "obsolete"
      ]
    }
  ],
  "word": "quatuor"
}

{
  "lang": "Latin",
  "lang_code": "la",
  "pos": "num",
  "senses": [
    {
      "alt_of": [
        {
          "word": "quattuor"
        }
      ],
      "categories": [
        "Latin cardinal numbers",
        "Latin entries with incorrect language header",
        "Latin indeclinable numerals",
        "Latin lemmas",
        "Latin medieval spellings",
        "Latin numerals"
      ],
      "glosses": [
        "medieval spelling of quattuor"
      ],
      "links": [
        [
          "quattuor",
          "quattuor#Latin"
        ]
      ],
      "tags": [
        "alt-of",
        "indeclinable",
        "obsolete"
      ]
    }
  ],
  "word": "quatuor"
}