halmos

H4A1L1M3O1S1

noun

The symbol “∎” marking the end of a proof.

Similar
tombstone
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Meanings

noun
  1. mathematicsThe symbol “∎” marking the end of a proof.

    Synonyms: tombstone

Synonyms & antonyms

nounThe symbol “∎” marking the end of a proof.

Similar
tombstone
Also see
tombstone

Origin

Named after Hungarian-born US mathematician Paul Halmos (1916-2006) who first used it in mathematics, after seeing it marking the end of articles in magazines.

Full word history & related roots →

Translations

Finnish todistuksen loppu -laatikko
  • todistuksen loppu -laatikkoTranslations
German Kästchen, Kiste
  • KästchenTranslations
  • KisteTranslations
  • GrabsteinTranslations
  • HalmosTranslations
Polish znak końca dowodu
  • znak końca dowoduTranslations

Rhymes & wordplay

Anagrams

shalom
Cite this entry
APA

halmos. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/halmos

MLA

“halmos.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/halmos. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “halmos,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/halmos.

Source: halmos on Wiktionary, CC BY-SA 4.0.