We found 36 dictionaries that define the word QED:

General (24 matching dictionaries)

1. qed: Longman Dictionary of Contemporary English
2. QED, QED: Merriam-Webster
3. QED: Oxford Learner's Dictionaries
4. QED: American Heritage Dictionary of the English Language
5. QED: Collins English Dictionary
6. QED: Vocabulary.com
7. QED, q.e.d, qed: Wordnik
8. QED, qed: Cambridge Advanced Learner's Dictionary
9. Q.E.D, QED, q.e.d: Wiktionary
10. Q.E.D: Webster's New World College Dictionary, 4th Ed.
11. Q.E.D: The Wordsmyth English Dictionary-Thesaurus
12. Q.E.D: Infoplease Dictionary
13. Q.E.D, QED: Dictionary.com
14. Q.E.D: Online Etymology Dictionary
15. Q.E.D, Q.E.D. (American TV series), Q.E.D. (BBC TV series), Q.E.D. (British TV series), Q.E.D. (Terje Rypdal album), Q.E.D. (U.S. TV series), Q.E.D. (UK TV series), Q.E.D. (manga), QED (band), QED (conference), QED (disambiguation), QED (play), QED (text editor), QED, Q.e.d, Qed: Wikipedia, the Free Encyclopedia
16. Qed: Rhymezone
17. QED, q.e.d, q.e.d, q.e.d. (quod erat demonstrandum): AllWords.com Multi-Lingual Dictionary
18. QED: Stammtisch Beau Fleuve Acronyms
19. Q.E.D: Dictionary of Phrase and Fable (1898)
20. qed: FreeDictionary.org
21. qed: Mnemonic Dictionary
22. Q.E.D, QED: TheFreeDictionary.com

Art (1 matching dictionary)

23. Q.E.D: Dictionary of Philosophical Terms and Names

Computing (1 matching dictionary)

24. QED: Encyclopedia

Miscellaneous (3 matching dictionaries)

25. QED: Acronym Finder
26. AbbreviationZ (No longer online)
27. QED: Idioms

Science (4 matching dictionaries)

28. Q.E.D: Eric Weisstein's World of Mathematics
29. QED: Extragalactic Astronomy
30. Q.E.D, Q.E.D, QED, QED: PlanetMath Encyclopedia
31. QED: A Dictionary of Quaternary Acronyms and Abbreviations

Slang (1 matching dictionary)

32. Q.E.D, Q'ed: Urban Dictionary

Tech (2 matching dictionaries)

33. AUTOMOTIVE TERMS (No longer online)
34. Rane Professional Audio Reference (No longer online)

(Note: See qeding as well.)

Definitions from Wiktionary ( ) ▸ noun:  (physics) (Partial) initialism of quantum electrodynamics. Similar: Q. E. D., HEDP, QNED, EDMR, double E, EIDE, E.D., AMEPD, EBID, QLED, more... Opposite: open problem, conjecture, unsolved problem Types: direct proof, indirect proof, proof by induction, proof by example, proof by exhaustion, more... Phrases: QED International, QED vacuum, Precision tests of QED, QED manifesto, part of qed, more... Adjectives: pure, scalar, massless, dimensional, conventional, compact, massive, nonrelativistic, perturbative, relativistic, ordinary ▸ Word origin ▸ Words similar to QED ▸ Usage examples for QED ▸ Idioms related to QED ▸ Wikipedia articles (New!) ▸ Popular adjectives describing QED ▸ Words that often appear near QED ▸ Rhymes of QED ▸ Invented words related to QED