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English definition of “doubt”

doubt

noun [C or U]     /daʊt/
B1 (a feeling of) not being certain about something, especially about how good or true it is: I'm having doubts about his ability to do the job . If there's any doubt about the rocket's engines , we ought to cancel the launch . The prosecution has to establish his guilt beyond reasonable doubt (US beyond a reasonable ) doubt. This latest scandal has raised doubts about his suitability for the post . [+ (that)] I never had any doubt (that) you would win . He's the most attractive man in the room , no doubt about that/it.Suspecting and questioningQuestioning people and asking questions in generalCuriosity no doubt C1 used to emphasize that what you are saying is true or likely to happen : We will, no doubt, discuss these issues again at the next meeting . No doubt you'll want to unpack and have a rest before dinner .Impossible and improbableCertaintyConfidence and self-assurance cast doubt on sth C2 to make something seem uncertain : Witnesses have cast doubt on the suspect's innocence .Suspecting and questioningQuestioning people and asking questions in generalCuriosity in doubt B2 If the future or success of someone or something is in doubt, it is unlikely to continue or to be successful : The future of the stadium is in doubt because of a lack of money .Impossible and improbableUncertaintyHesitatingAchievable without (a) doubt B2 used to emphasize your opinion : She is without (a) doubt the best student I have ever taught . → See also undoubtedlyIntensifying expressions undoubtedlyGrammar:No doubt or without doubt?We can use no doubt when we think that what we are saying is likely to happen, or when we think it is true. It is similar to ‘I suppose’ or ‘I imagine’:
(Definition of doubt noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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