"Vicennalia" meaning in English

{
  "head_templates": [
    {
      "args": {
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      "expansion": "Vicennalia pl (plural only)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "vicennalia"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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          "kind": "other",
          "name": "English pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1971, P.V. Hill, \"The Dating and Arrangement of Hadrian's COS III\", Mints, Dies and Currency, p. 52",
          "text": "Apart from the Vicennalia, 136 was an eventful year for the imperial family: the serious illness of Hadrian in the spring, the adoption of Aelius in the summer and the death and consecration of Sabina at the end of the year."
        }
      ],
      "glosses": [
        "Alternative letter-case form of vicennalia."
      ],
      "id": "en-Vicennalia-en-noun-H~qK8GD2",
      "links": [
        [
          "vicennalia",
          "vicennalia#English"
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      ],
      "tags": [
        "alt-of",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "Vicennalia"
}

{
  "head_templates": [
    {
      "args": {
        "1": "p"
      },
      "expansion": "Vicennalia pl (plural only)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "vicennalia"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English pluralia tantum"
      ],
      "examples": [
        {
          "ref": "1971, P.V. Hill, \"The Dating and Arrangement of Hadrian's COS III\", Mints, Dies and Currency, p. 52",
          "text": "Apart from the Vicennalia, 136 was an eventful year for the imperial family: the serious illness of Hadrian in the spring, the adoption of Aelius in the summer and the death and consecration of Sabina at the end of the year."
        }
      ],
      "glosses": [
        "Alternative letter-case form of vicennalia."
      ],
      "links": [
        [
          "vicennalia",
          "vicennalia#English"
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      "tags": [
        "alt-of",
        "plural",
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    }
  ],
  "word": "Vicennalia"
}