Meaning of “bluster” in the English Dictionary

"bluster" in British English

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blusterverb [ I ]

uk /ˈblʌs.tər/ us /ˈblʌs.tɚ/

bluster verb [ I ] (WIND)

If the wind blusters, it blows strongly:

A gale was blustering around the house.
noun [ U ] uk us

I knew that it was all bluster and he wasn't really angry with me.

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

"bluster" in American English

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blusternoun [ U ]

us /ˈblʌs·tər/

talk intended to seem important or threatening but which is not taken seriously and has little effect:

For all his bluster about his military adventures, McLaughlin was enormously likable.

(Definition of “bluster” from the Cambridge Academic Content Dictionary © Cambridge University Press)