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English definition of “shake-up”

shake-up

noun [C usually singular]     /ˈʃeɪk.ʌp/
a large change in the way something is organized: The company is undergoing a radical shake-up. The arrival of the new baby caused a thorough shake-up of their family life.Change and changes
(Definition of shake-up noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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