Meaning of “certainty” in the English Dictionary

"certainty" in British English

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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.

More examples

  • Somehow she knew, with deep-down certainty, that her son was still alive.
  • Each one of us faces the certainty that we are going to die.
  • I can't say I'm certain they'll win, because there are no certainties in life, but they've got an excellent chance.
  • Can you state with certainty that this is the same man you saw on that day?
  • He stood up and declared his faith with absolute certainty.

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

"certainty" in American English

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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)