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English definition of “warm up”

warm up

(EVENT) informal phrasal verb with warm     /wɔːm/ US  /wɔːrm/ verb [I or T]
If an event warms up, it starts to become more interesting , enjoyable , or exciting : The party was only just starting to warm up as I left .Becoming betterMaking things betterMaking progress and advancing
(Definition of warm up (EVENT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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