"Idus" meaning in Latin

{
  "forms": [
    {
      "form": "Īdūs",
      "tags": [
        "canonical",
        "feminine",
        "plural"
      ]
    },
    {
      "form": "Īduum",
      "tags": [
        "genitive"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "declension",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "la-ndecl",
      "source": "declension",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "Īdūs",
      "source": "declension",
      "tags": [
        "nominative",
        "plural"
      ]
    },
    {
      "form": "Īduum",
      "source": "declension",
      "tags": [
        "genitive",
        "plural"
      ]
    },
    {
      "form": "Īdibus",
      "source": "declension",
      "tags": [
        "dative",
        "plural"
      ]
    },
    {
      "form": "Īdūs",
      "source": "declension",
      "tags": [
        "accusative",
        "plural"
      ]
    },
    {
      "form": "Īdibus",
      "source": "declension",
      "tags": [
        "ablative",
        "plural"
      ]
    },
    {
      "form": "Īdūs",
      "source": "declension",
      "tags": [
        "plural",
        "vocative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "Īdūs<4>",
        "g": "f"
      },
      "expansion": "Īdūs f pl (genitive Īduum); fourth declension",
      "name": "la-noun"
    },
    {
      "args": {
        "1": "la",
        "2": "pluralonly"
      },
      "expansion": "(plural only)",
      "name": "tlb"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "Īdūs<4>"
      },
      "name": "la-ndecl"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "the ides of a Roman month",
          "word": "īdūs"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin feminine nouns in the fourth declension",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of īdūs: the ides of a Roman month."
      ],
      "id": "en-Idus-la-noun-gEwXE5EY",
      "links": [
        [
          "īdūs",
          "idus#Latin"
        ],
        [
          "ides",
          "ides"
        ],
        [
          "Roman",
          "Roman"
        ],
        [
          "month",
          "month"
        ]
      ],
      "synonyms": [
        {
          "word": "Id."
        }
      ],
      "tags": [
        "alt-of",
        "alternative",
        "declension-4",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "Idus"
}

{
  "forms": [
    {
      "form": "Īdūs",
      "tags": [
        "canonical",
        "feminine",
        "plural"
      ]
    },
    {
      "form": "Īduum",
      "tags": [
        "genitive"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "declension",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "la-ndecl",
      "source": "declension",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "Īdūs",
      "source": "declension",
      "tags": [
        "nominative",
        "plural"
      ]
    },
    {
      "form": "Īduum",
      "source": "declension",
      "tags": [
        "genitive",
        "plural"
      ]
    },
    {
      "form": "Īdibus",
      "source": "declension",
      "tags": [
        "dative",
        "plural"
      ]
    },
    {
      "form": "Īdūs",
      "source": "declension",
      "tags": [
        "accusative",
        "plural"
      ]
    },
    {
      "form": "Īdibus",
      "source": "declension",
      "tags": [
        "ablative",
        "plural"
      ]
    },
    {
      "form": "Īdūs",
      "source": "declension",
      "tags": [
        "plural",
        "vocative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "Īdūs<4>",
        "g": "f"
      },
      "expansion": "Īdūs f pl (genitive Īduum); fourth declension",
      "name": "la-noun"
    },
    {
      "args": {
        "1": "la",
        "2": "pluralonly"
      },
      "expansion": "(plural only)",
      "name": "tlb"
    }
  ],
  "inflection_templates": [
    {
      "args": {
        "1": "Īdūs<4>"
      },
      "name": "la-ndecl"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "the ides of a Roman month",
          "word": "īdūs"
        }
      ],
      "categories": [
        "Latin entries with incorrect language header",
        "Latin feminine nouns",
        "Latin feminine nouns in the fourth declension",
        "Latin fourth declension nouns",
        "Latin lemmas",
        "Latin nouns",
        "Latin nouns with red links in their inflection tables",
        "Latin pluralia tantum",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Alternative form of īdūs: the ides of a Roman month."
      ],
      "links": [
        [
          "īdūs",
          "idus#Latin"
        ],
        [
          "ides",
          "ides"
        ],
        [
          "Roman",
          "Roman"
        ],
        [
          "month",
          "month"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "declension-4",
        "plural",
        "plural-only"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Id."
    }
  ],
  "word": "Idus"
}