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English definition of “chill out”

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chill out

( also chill) informal
verb [I or T] uk phrasal verb with chill   /tʃɪl/ us  
B2 to relax completely, or not allow things to upset you: I'm just chilling out in front of the TV. Chill out, Dad. The train doesn't leave for another hour!
(Definition of chill out from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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