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English definition of “spike”

spike

verb [T] [I] (LEVEL)    /spaɪk/
to rise to a higher amount, price, or level, usually before going down again: The jobless rate in October spiked to a five-year high.Increasing and intensifying
(Definition of spike verb (LEVEL) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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