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English definition of “upsurge”

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upsurge

noun [C] uk   /ˈʌp.sɜːdʒ/ us    /-sɝːdʒ/
a sudden and usually large increase in something: An upsurge of/in violence in the district has been linked to increased unemployment.
(Definition of upsurge from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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