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English definition of “hot up”

hot up

UK informal phrasal verb with hot     /hɒt/ US  /hɑːt/ verb (-tt-)
If an event or situation hots up, it becomes more exciting and more things start to happen: A few days before the elections, the pace began to hot up. The competition is really hotting up now.Increasing and intensifying
(Definition of hot up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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