Word.ws English Dictionary

q. e. d.

q. e. d. is the alternative letter-case form of Q.E.D..

Meaning of Q.E.D.

Phrase

Q.E.D.

  1. (broadly) Used to indicate that an argument or proposition is proved by the existence of some fact or scenario.
    • That this part of the world has actually been peopled (Q. E. D.) to support which, we have living proofs in the numerous tribes of Indians that inhabit it.1809, Diedrich Knickerbocker [pseudonym; Washington Irving], chapter IV, in A History of New York, from the Beginning of the World to the End of the Dutch Dynasty. […], volume I, New York, N.Y....

See all 2 meanings of q.e.d.

Phrase capitalized: Q. E. D.

Q. E. D.

  1. (alternative) Alternative form of Q.E.D. (“initialism of quod erat demonstrandum”).
    • If death, ſaid my father, reaſoning with himſelf, is nothing but the ſeparation of the ſoul from the body;—and if it is true that people can walk about and do their buſineſs without brains,—then certes the ſoul does not inhabit there. Q. E. D.1759, [Laurence Sterne], chapter XIX, in The Life and Opinions of Tristram Shandy, Gentleman, 2nd (1st London) edition, volume II, London: […] R[obert] and J[ames] Dodsley […], published 1760, →OCLC...
    • Theorem 2. The Angles B, C, at the Baſe of an Iſoceles Triangle ABC, are equal to each other; and a Line AD biſecting the Angle BAC, divides the Baſe into two equal Parts, and is perpendicular thereto. For becauſe the Line AD biſects the #92;angleA, that is, makes the #92;angleBAD#61;#92;angleCAD...1775, Benjamin Donn, “An Essay on Plane Geometry”, in The Geometrician: Containing Essays on Plane Geometry, and Trigonometry: […], 2nd edition, London: Sold by J[oseph] Johnson, […], →OCLC, book I...

Noun capitalized: Q. E. D.

Q. E. D.

  1. (alternative) Alternative form of Q.E.D. (“some fact or scenario that proves an argument or proposition”).
    • This was exactly the Q. E. D. of the paper.1814 February, G. D. Yeats, “Account of Ann Fooks’s Case of Ischuria and Vomiting of Urine”, in Samuel Fothergill, John Want, editors, The Medical and Physical Journal, volume XXXI, part 2, number...
    • The Unitarian might therefore here easily produce his Q. E. D. for the exclusion of all but the maintainers of Christ's proper humanity from the pale of Christianity.1825, William Magee, “Supplement to the Remarks on the Unitarian Version of the New Testament”, in Discourses and Dissertations on the Scriptural Doctrines of Atonement & Sacrifice; […], volume II...

Questions about q. e. d.

What is q. e. d. the alternative letter-case form of?
Q. e. d. is the alternative letter-case form of Q.E.D..
What part of speech is q. e. d.?
Q. e. d. can be a phrase or a noun.

Words near q. e. d. in the dictionary

  1. Q-waves
  2. q-word
  3. q-words
  4. q.
  5. Q. C.
  6. q. e. d.
  7. q. v.
  8. Q.931
  9. Q.A.C.
  10. Q.C.
  11. q.e.d.

Source and license

Adapted from Wiktionary: q. e. d. (page history and authors); Q. E. D. (page history and authors); Q.E.D. (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “q. e. d..” Word.ws, https://word.ws/q._e._d.. Based on Wiktionary, CC BY-SA 4.0.