"null sign" meaning in All languages combined

See null sign on Wiktionary

Noun [English]

Forms: null signs [plural]
Head templates: {{en-noun}} null sign (plural null signs)
  1. (set theory) The sign ∅, associated with empty sets.
    Sense id: en-null_sign-en-noun-hMchezf6 Categories (other): English entries with incorrect language header, Pages with 1 entry, Pages with entries, Set theory Topics: mathematics, sciences, set-theory

Inflected forms

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    {
      "form": "null signs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "null sign (plural null signs)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Set theory",
          "orig": "en:Set theory",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The sign ∅, associated with empty sets."
      ],
      "id": "en-null_sign-en-noun-hMchezf6",
      "links": [
        [
          "set theory",
          "set theory"
        ],
        [
          "sign",
          "sign"
        ],
        [
          "∅",
          "∅"
        ],
        [
          "associated",
          "associated"
        ],
        [
          "empty set",
          "empty set"
        ]
      ],
      "raw_glosses": [
        "(set theory) The sign ∅, associated with empty sets."
      ],
      "topics": [
        "mathematics",
        "sciences",
        "set-theory"
      ]
    }
  ],
  "word": "null sign"
}

{
  "forms": [
    {
      "form": "null signs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "null sign (plural null signs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Set theory"
      ],
      "glosses": [
        "The sign ∅, associated with empty sets."
      ],
      "links": [
        [
          "set theory",
          "set theory"
        ],
        [
          "sign",
          "sign"
        ],
        [
          "∅",
          "∅"
        ],
        [
          "associated",
          "associated"
        ],
        [
          "empty set",
          "empty set"
        ]
      ],
      "raw_glosses": [
        "(set theory) The sign ∅, associated with empty sets."
      ],
      "topics": [
        "mathematics",
        "sciences",
        "set-theory"
      ]
    }
  ],
  "word": "null sign"
}

Download raw JSONL data for null sign meaning in All languages combined (0.8kB)

This page is a part of the kaikki.org machine-readable All languages combined dictionary. This dictionary is based on structured data extracted on 2025-05-27 from the enwiktionary dump dated 2025-05-20 using wiktextract (a4e883e and f1c2b61). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

If you use this data in academic research, please cite Tatu Ylonen: Wiktextract: Wiktionary as Machine-Readable Structured Data, Proceedings of the 13th Conference on Language Resources and Evaluation (LREC), pp. 1317-1325, Marseille, 20-25 June 2022. Linking to the relevant page(s) under https://kaikki.org would also be greatly appreciated.