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boom

noun [C or U] (PERIOD OF GROWTH)
 
 
/buːm/

Definition

a period of sudden economic growth, especially one that results in a lot of money being made: This year has seen a boom in book sales. The insurance business suffered from a vicious cycle of boom and bust. the property boomEconomics and the state of the economySuccess and achievementsHigher and lower points of achievementFailures
(Definition of boom noun (PERIOD OF GROWTH) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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