Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Latin
Origin: idiota 'person who knows nothing', from Greek idiotes 'private person, person who knows nothing', from idios 'own, personal, private'

idiot

noun
     
id‧i‧ot [countable]
1 a stupid person or someone who has done something stupid:
It was all your fault, you idiot.
2 old use someone who is mentally ill or has a very low level of intelligence
idiotic adjective:
Stop asking such idiotic questions.
idiotically adverb

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