null sign

noun

The sign ∅, associated with empty sets.

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Meanings

nounnull sign (plural null signs)

plural null signs

  1. mathematicsThe sign ∅, associated with empty sets.
Cite this entry
APA

null sign. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/null%20sign

MLA

“null sign.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/null%20sign. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “null sign,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/null%20sign.

Source: null sign on Wiktionary, CC BY-SA 4.0.