Definition of idiot noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈɪdiət//
    ; NAmE NAmE//ˈɪdiət//
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  1. 1(informal) a very stupid person synonym fool When I lost my passport, I felt such an idiot. Not that switch, you idiot! See related entries: Stupid
  2. 2(old-fashioned, offensive) a person with very low intelligence who cannot think or behave normally
  3. Word OriginMiddle English (denoting a person of low intelligence): via Old French from Latin idiota ‘ignorant person’, from Greek idiōtēs ‘private person, layman, ignorant person’, from idios ‘own, private’.Extra examples He was giggling like a drunken idiot. He’s made a complete idiot of himself over this woman! I felt (like) a complete idiot, standing there in front of all those people! She called me an idiot. She knew she was acting like an idiot. What stupid idiot left their shoes on the stairs? I just stood there like an idiot with my mouth open. I realized I was dealing with a bunch of idiots. When I lost my passport, I felt like such an idiot.
See the Oxford Advanced American Dictionary entry: idiot