[ mawr-on, mohr- ]
/ ˈmɔr ɒn, ˈmoʊr- /


Informal. a person who is notably stupid or lacking in good judgment: I wonder why they elected that narrow-minded moron to Congress.
Psychology. (no longer in technical use; now considered offensive) a person of borderline intelligence in a former and discarded classification of mental retardation, having an intelligence quotient of 50 to 69.

Nearby words

  1. moro's reflex,
  2. moro, aldo,
  3. moroccan,
  4. morocco,
  5. morogoro,
  6. moroni,
  7. moronic,
  8. moronity,
  9. moror,
  10. moros

Origin of moron

1905–10, Americanism; < Greek mōrón, neuter of mōrós foolish, dull

Related formsmo·ron·ic [muh-ron-ik] /məˈrɒn ɪk/, adjectivemo·ron·i·cal·ly, adverbmo·ron·ism, mo·ron·i·ty [muh-ron-i-tee] /məˈrɒn ɪ ti/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for moronic


/ (ˈmɔːrɒn) /


a foolish or stupid person
a person having an intelligence quotient of between 50 and 70, able to work under supervision
Derived Formsmoronic (mɒˈrɒnɪk), adjectivemoronically, adverbmoronism or moronity, noun

Word Origin for moron

C20: from Greek mōros foolish

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

Word Origin and History for moronic
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for moronic


[ môrŏn′ ]


A person of mild mental retardation having a mental age of from 7 to 12 years and generally having communication and social skills enabling some degree of academic or vocational education. The term belongs to a classification system no longer in use and is now considered offensive.
Related formsmo•ronic (mə-rŏnĭk, mô-) adj.moron′ism null n.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.