uncertain Definition in Cambridge British English Dictionary
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Definition of "uncertain" - British English Dictionary

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uncertainadjective

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. Bridie was uncertain about meeting him.B2 not known or fixed, or not completely certain: New arrivals face an uncertain future. The political outlook is still uncertain.
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uncertainly
adverb uk   us   /-li/
(Definition of uncertain from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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