"not." meaning in English

{
  "forms": [
    {
      "form": "not.",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "not."
      },
      "expansion": "not. (plural not.)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "notice"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Mon. Not. R. Astron. Soc.\nMonthly Notices of the Royal Astronomical Society — ISO 4 abbreviated title",
          "type": "example"
        }
      ],
      "glosses": [
        "Abbreviation of notice."
      ],
      "id": "en-not.-en-noun-hImrvjlo",
      "links": [
        [
          "notice",
          "notice#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "not."
}

{
  "forms": [
    {
      "form": "not.",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "not."
      },
      "expansion": "not. (plural not.)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "notice"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English indeclinable nouns",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms spelled with .",
        "English terms with usage examples",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Mon. Not. R. Astron. Soc.\nMonthly Notices of the Royal Astronomical Society — ISO 4 abbreviated title",
          "type": "example"
        }
      ],
      "glosses": [
        "Abbreviation of notice."
      ],
      "links": [
        [
          "notice",
          "notice#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "not."
}