Dictionary.com

QED

Save This Word!

abbreviation Physics.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Words nearby QED

Other definitions for QED (2 of 2)

Q.E.D.

abbreviation
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 Latin quod erat dēmōnstrandum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use QED in a sentence

  • 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
FEEDBACK