Definition of “certainty” - English Dictionary

“certainty” in British English

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certaintynoun

uk /ˈsɜː.tən.ti/ us /ˈsɝː.tən.ti/

certainty noun (IN NO DOUBT)

[ C ] something that cannot be doubted:

There are few absolute certainties in life.

B2 [ U ] the state of being completely confident or having no doubt about something:

I'm unable to answer that question with any certainty.

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

“certainty” in American English

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certaintynoun

us /ˈsɜr·tən·ti/

certainty noun (SURE KNOWLEDGE)

[ U ] the sure knowledge 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)