Definition from Wiktionary, the free dictionary
Jump to: navigation, search
See also: [U+25A0 BLACK SQUARE] and [U+23F9 BLACK SQUARE FOR STOP]
U+220E, ∎
(LaTeX: \blacksquare)
END OF PROOF

[U+220D]
Mathematical Operators
[U+220F]

Translingual[edit]

Wikipedia has an article on:
Wikipedia

Etymology[edit]

Introduced into mathematical usage by Paul Halmos, modeled after the end sign (a printer’s ornament or dingbat used to indicate the end of an article or story) found in popular print media.

Symbol[edit]

  1. (mathematics) QED.

Usage notes[edit]

The symbol itself is called a tombstone or halmos in English.