uncertain Definition in the Cambridge English Dictionary

Definition of “uncertain” - English Dictionary

"uncertain" in American English

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uncertainadjective [not gradable]

 us   /ʌnˈsɜr·tən/
unclear, or not ​sure: She ​faces an uncertain ​future. We’re uncertain of the ​cause of ​death.
noun [C/U]  us   /ʌnˈsɜr·tən·ti/
[U] They ​live in uncertainty and ​confusion.
(Definition of uncertain from the Cambridge Academic Content Dictionary © Cambridge University Press)

"uncertain" in British English

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uk   /ʌnˈsɜː.tən/  us   /-ˈsɝː-/
B2 not ​knowing what to do or ​believe, or not ​able to ​decide about something: [+ question word] She's uncertain whether to go to New Zealand or not. Ariana was uncertain aboutmeeting him.B2 not ​known or ​fixed, or not ​completelycertain: These ​refugeesface an uncertain future. The ​politicaloutlook is still uncertain.
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adverb uk   us   /-li/
(Definition of uncertain from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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