Meaning of “upsurge” in the English Dictionary

"upsurge" in American English

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upsurgenoun [ C ]

us /ˈʌpˌsɜrdʒ/

a sudden or large increase:

Department stores report a recent upsurge in credit-card fraud.

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

"upsurge" in Business English

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upsurgenoun [ C, usually singular ]

uk /ˈʌpsɜːdʒ/ us

a sudden large increase in something:

upsurge in sth The recent upsurge in people working beyond the retirement age is due to the falling value of pension funds and savings.

(Definition of “upsurge” from the Cambridge Business English Dictionary © Cambridge University Press)