"IXth" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "IXth (not comparable)",
      "name": "en-adj"
    }
  ],
  "hyphenation": [
    "IXth"
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "ninth"
        }
      ],
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "9th; Abbreviation of ninth."
      ],
      "id": "en-IXth-en-adj-XvTADv5D",
      "links": [
        [
          "9th",
          "9th#English"
        ],
        [
          "ninth",
          "ninth#English"
        ]
      ],
      "raw_glosses": [
        "(rare) 9th; Abbreviation of ninth."
      ],
      "related": [
        {
          "sense": "Previous",
          "word": "VIIIth"
        },
        {
          "sense": "Next",
          "word": "Xth"
        }
      ],
      "synonyms": [
        {
          "word": "9th"
        },
        {
          "word": "ninth"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "not-comparable",
        "rare"
      ]
    }
  ],
  "word": "IXth"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "IXth (not comparable)",
      "name": "en-adj"
    }
  ],
  "hyphenation": [
    "IXth"
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "sense": "Previous",
      "word": "VIIIth"
    },
    {
      "sense": "Next",
      "word": "Xth"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "ninth"
        }
      ],
      "categories": [
        "English abbreviations",
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English ordinal numbers",
        "English terms containing Roman numerals",
        "English terms with rare senses",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "9th; Abbreviation of ninth."
      ],
      "links": [
        [
          "9th",
          "9th#English"
        ],
        [
          "ninth",
          "ninth#English"
        ]
      ],
      "raw_glosses": [
        "(rare) 9th; Abbreviation of ninth."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "not-comparable",
        "rare"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "9th"
    },
    {
      "word": "ninth"
    }
  ],
  "word": "IXth"
}