certainty Definition in the Cambridge English Dictionary
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Definition of “certainty” - English Dictionary

Definition of "certainty" - American English Dictionary

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certaintynoun

 us   /ˈsɜr·tən·ti/

certainty noun (SURE KNOWLEDGE)

[U] the ​sureknowledge that something is ​true: Can you say with ​absolute certainty that this is the man you ​saw?

certainty noun (CERTAIN EVENT)

[C] something that has no ​possibility of any other ​result; something that you ​know will ​happen in a ​particular way: There are few certainties in ​life.
(Definition of certainty from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "certainty" - British English Dictionary

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certaintynoun

uk   /ˈsɜː.tən.ti/  us   /ˈsɝː-/

certainty noun (IN NO DOUBT)

[C] something that cannot be ​doubted: There are few ​absolute certainties in ​life.B2 [U] the ​state of being ​completelyconfident or having no ​doubt about something: I'm ​unable to ​answer that ​question with any certainty.
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certainty noun (EXTREMELY LIKELY)

C2 [C] something that is very ​likely to ​happen: Joan will ​win - that's a certainty. [+ to infinitive] Joan is a certainty towin.
(Definition of certainty from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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