mo·ron

[mawr-on, mohr-]
noun
1.
Informal. a person who is notably stupid or lacking in good judgment.
2.
Psychology. (no longer in technical use; considered offensive) a person of borderline intelligence in a former and discarded classification of mental retardation, having an intelligence quotient of 50 to 69.
Compare feeble-minded.


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

mo·ron·ic [muh-ron-ik] , adjective
mo·ron·i·cal·ly, adverb
mo·ron·ism, mo·ron·i·ty [muh-ron-i-tee] , noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Moronic is always a great word to know.
So is callithumpian. Does it mean:
the offspring of a zebra and a donkey.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
moron (ˈmɔːrɒn) [Click for IPA pronunciation guide]
 
n
1.  a foolish or stupid person
2.  a person having an intelligence quotient of between 50 and 70, able to work under supervision
 
[C20: from Greek mōros foolish]
 
moronic
 
adj
 
mo'ronically
 
adv
 
'moronism
 
n
 
mo'ronity
 
n

moron (ˈmɔːrɒn) [Click for IPA pronunciation guide]
 
n
1.  a foolish or stupid person
2.  a person having an intelligence quotient of between 50 and 70, able to work under supervision
 
[C20: from Greek mōros foolish]
 
moronic
 
adj
 
mo'ronically
 
adv
 
'moronism
 
n
 
mo'ronity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

moron
1910, from Gk. (Attic) moron, neut. of moros "foolish, dull" (probably cognate with Skt. murah "idiotic;" L. morus "foolish" is a loan-word from Gk.). Adopted by the American Association for the Study of the Feeble-minded with a technical definition "adult with a mental age between 8 and 12;" used as
an insult since 1922 and subsequently dropped from technical use. Linnæus had introduced morisis "idiocy."

moronic
1921, from moron + -ic.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

moron mo·ron (môr'ŏn')
n.
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.


mo·ron'ic (mə-rŏn'ĭk, mô-) adj.
mo'ron'ism or mo·ron'i·ty (mə-rŏn'ĭ-tē, mô-) n.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Instead of your moronic comment maybe you should try to understand what the
  article is trying to say.
What your moronic opinion makers do, affects us globally.
It's moronic, but every once in a while it comes up with something amazing.
He might have been funny at one time but now he's a pathetic bitter and moronic
  d-bag.
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