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Question 1 of 7
Lincolnesque

Definition for qed (2 of 2)

Q.E.D.

which was to be shown or demonstrated (used especially in mathematical proofs).

Origin of Q.E.D.

First recorded in 1810–20, Q.E.D. is from the Latin word quod erat dēmōnstrandum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for qed

  • QED” was not intelligible to him, but it sounded very well indeed, he thought.

British Dictionary definitions for qed

QED

abbreviation for

quod erat demonstrandum
quantum electrodynamics

Word Origin for QED

(sense 1) Latin: which was to be shown or proved
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012