"twelveth" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "twelve",
        "3": "th"
      },
      "expansion": "twelve + -th",
      "name": "suffix"
    }
  ],
  "etymology_text": "From twelve + -th.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "twelveth",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "English ordinal numbers",
          "parents": [
            "Ordinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -th",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "twelfth."
      ],
      "id": "en-twelveth-en-adj-jlZKiivd",
      "links": [
        [
          "twelfth",
          "twelfth"
        ]
      ],
      "raw_glosses": [
        "(archaic) twelfth."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "twelveth"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "twelve",
        "3": "th"
      },
      "expansion": "twelve + -th",
      "name": "suffix"
    }
  ],
  "etymology_text": "From twelve + -th.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "twelveth",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English ordinal numbers",
        "English terms suffixed with -th",
        "English terms with archaic senses",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "twelfth."
      ],
      "links": [
        [
          "twelfth",
          "twelfth"
        ]
      ],
      "raw_glosses": [
        "(archaic) twelfth."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "word": "twelveth"
}