"treas" meaning in Scottish Gaelic

{
  "forms": [
    {
      "form": "an treas",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gd",
        "2": "numeral",
        "head": "an treas"
      },
      "expansion": "an treas",
      "name": "head"
    }
  ],
  "lang": "Scottish Gaelic",
  "lang_code": "gd",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Scottish Gaelic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Scottish Gaelic links with ignored alt parameters",
          "parents": [
            "Links with ignored alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Scottish Gaelic links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Scottish Gaelic ordinal numbers",
          "parents": [
            "Ordinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "an Treas Domhan"
        },
        {
          "word": "an treas pearsa"
        }
      ],
      "glosses": [
        "third"
      ],
      "id": "en-treas-gd-num-semTJFBb",
      "links": [
        [
          "third",
          "third"
        ]
      ],
      "related": [
        {
          "word": "trì"
        }
      ],
      "synonyms": [
        {
          "word": "treasamh"
        },
        {
          "word": "trìtheamh"
        }
      ]
    }
  ],
  "word": "treas"
}

{
  "derived": [
    {
      "word": "an Treas Domhan"
    },
    {
      "word": "an treas pearsa"
    }
  ],
  "forms": [
    {
      "form": "an treas",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "gd",
        "2": "numeral",
        "head": "an treas"
      },
      "expansion": "an treas",
      "name": "head"
    }
  ],
  "lang": "Scottish Gaelic",
  "lang_code": "gd",
  "pos": "num",
  "related": [
    {
      "word": "trì"
    }
  ],
  "senses": [
    {
      "categories": [
        "Scottish Gaelic entries with incorrect language header",
        "Scottish Gaelic lemmas",
        "Scottish Gaelic links with ignored alt parameters",
        "Scottish Gaelic links with redundant alt parameters",
        "Scottish Gaelic numerals",
        "Scottish Gaelic ordinal numbers"
      ],
      "glosses": [
        "third"
      ],
      "links": [
        [
          "third",
          "third"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "treasamh"
    },
    {
      "word": "trìtheamh"
    }
  ],
  "word": "treas"
}