portentous Meaning in the Cambridge English Dictionary
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Meaning of “portentous” in the English Dictionary

"portentous" in British English

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portentousadjective

uk   /pɔːˈten.təs/  us   /pɔːrˈten.t̬əs/
formal disapproving too ​serious and ​trying to be very ​important: The ​problem with the ​book is that it sometimes ​descends into portentous ​philosophizing. literary Portentous ​events, ​statements, or ​signs are ​important because they show that something ​unpleasant is very ​likely to ​happen: The ​reportcontainsnumerous portentous ​references to a ​futureenvironmentalcalamity.
portentously
adverb uk   us   /-li/ formal disapproving
(Definition of portentous from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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