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English definition of “chill out”

chill out

(also chill) informal phrasal verb with chill     /tʃɪl/ verb [I or T]
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!Calming and relaxing
(Definition of chill out from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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