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moron

Etymology and origin of the English word moron

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Pronunciation

  • IPA: /ˈmɔːɹɒn/ (UK); /ˈmoɹɑn/ (US)[1]

Etymology

It was coined from Ancient Greek μωρόν (mōrón), the neuter of mōrós “foolish, dull, stupid”,[2][3][4][5][6] a word of uncertain origin.[4] Merriam-Webster calls the formation irregular.[5] It is related to oxymoron and sophomore.[1]

Earliest recorded meaning

A technical term in psychology (1910), adopted by the American Association for the Study of the Feeble-minded for an adult with a mental age of about eight to twelve, the highest grade in a classification that also had idiot and imbecile.[3][4][7]

Semantic evolution

The word was used as an insult in print by 1918[4] and in the general sense of a stupid person from 1922;[7] it was later dropped from technical use.[4] The American Heritage Dictionary notes that the old classification is no longer used and that the clinical sense is now considered offensive.[2] The adjective moronic is recorded from 1926.[3][7]

Timeline

  • 1910 – technical term in psychology.[3][4][5][7]
  • 1918 – used as an insult.[4]
  • 1922 – a stupid person.[7]
  • 1926 – moronic.[3][7]

Modern meaning

Noun

  1. A very stupid person; a fool.
  2. (offensive, dated) In a former psychological classification, a person with a mild intellectual disability.

Word family

  • moronic
  • moronically
  • moronity

Usage notes

Wiktionary notes that the current medical term for the former clinical range is “mild intellectual disability”.[1]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
  3. ^ a b c d e Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
  4. ^ a b c d e f g Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b c Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  6. ^ Random House Webster's Unabridged Dictionary (1999), 2nd ed., New York: Random House
  7. ^ a b c d e f Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
Cite this entry

“Moron.” Etymologically, 11 Oct. 2026, etymologically.com/en/moron. Accessed 11 Oct. 2026.

Last edited on . ·