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English definition of “countdown”

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countdown

noun uk   /ˈkaʊnt.daʊn/ us  
[C] the act of counting backwards to zero: The countdown to the rocket launch will begin at 9.00 a.m. [S] a short period of time leading to an important event: The countdown to the election has already begun.
(Definition of countdown from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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