"IR" meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "proper noun"
      },
      "expansion": "IR",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“Jesus, the king”). Short for INRI.",
          "word": "Iesus Rex"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "la",
          "name": "Christianity",
          "orig": "la:Christianity",
          "parents": [
            "Abrahamism",
            "Religion",
            "Culture",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of Iesus Rex (“Jesus, the king”). Short for INRI."
      ],
      "id": "en-IR-la-name-ZCwWflwD",
      "links": [
        [
          "Christianity",
          "Christianity"
        ],
        [
          "Iesus",
          "Iesus#Latin"
        ],
        [
          "Rex",
          "rex#Latin"
        ],
        [
          "INRI",
          "INRI#Latin"
        ]
      ],
      "raw_glosses": [
        "(Christianity) Initialism of Iesus Rex (“Jesus, the king”). Short for INRI."
      ],
      "related": [
        {
          "word": "INRI"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "Christianity"
      ]
    }
  ],
  "word": "IR"
}

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "proper noun"
      },
      "expansion": "IR",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "related": [
    {
      "word": "INRI"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "extra": "(“Jesus, the king”). Short for INRI.",
          "word": "Iesus Rex"
        }
      ],
      "categories": [
        "Latin entries with incorrect language header",
        "Latin initialisms",
        "Latin lemmas",
        "Latin proper nouns",
        "Latin short forms",
        "la:Christianity"
      ],
      "glosses": [
        "Initialism of Iesus Rex (“Jesus, the king”). Short for INRI."
      ],
      "links": [
        [
          "Christianity",
          "Christianity"
        ],
        [
          "Iesus",
          "Iesus#Latin"
        ],
        [
          "Rex",
          "rex#Latin"
        ],
        [
          "INRI",
          "INRI#Latin"
        ]
      ],
      "raw_glosses": [
        "(Christianity) Initialism of Iesus Rex (“Jesus, the king”). Short for INRI."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "Christianity"
      ]
    }
  ],
  "word": "IR"
}