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English definition of “inconceivable”

inconceivable

adjective uk   /ˌɪn.kənˈsiː.və.bl̩/ us  
C2 impossible to imagine or think of: The idea that they might not win was inconceivable to them. It would be inconceivable for her to change her mind. extremely unlikely: Another nuclear accident in the same place is virtually/almost inconceivable. It is not inconceivable (= it is possible) that she could be lying.
inconceivably
adverb uk   /-bli/ us  
(Definition of inconceivable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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