Longman Dictionary of Contemporary English homepage

Date: 1900-2000
Language: Greek
Origin: moros 'of low intelligence'

moron

 noun
     
Related topics: Illness and Disability
mo‧ron [countable]
1 informal not polite a very offensive word for someone who you think is very stupid [= idiot]:
• Don't leave it there, you moron!
2 technical old-fashionedMI someone whose intelligence has not developed to the normal level
—moronic adjective:
a moronic grin
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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