Definition of “idiot” - English Dictionary

“idiot” in English

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idiotnoun [ C ]

uk /ˈɪd.i.ət/ us /ˈɪd.i.ət/

B2 a stupid person or someone who is behaving in a stupid way:

Some idiot left the tap running in the bathroom and there's water everywhere.
[ as form of address ] You stupid idiot - that's a month's work you've lost!

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(Definition of “idiot” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“idiot” in American English

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idiotnoun [ C ]

us /ˈɪd·i·ət/

a foolish person, esp. someone who has done something stupid:

I felt like an idiot.
adjective us /ˌɪd·iˈɑt̬·ɪk/

Whose idiotic idea was it to go camping?

(Definition of “idiot” from the Cambridge Academic Content Dictionary © Cambridge University Press)