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black sth out

(NO LIGHT) phrasal verb with black
 
 
/blæk/ verb [T]

Definition

to make a place dark, especially by covering or switching off all the lights: The entire city was blacked out overnight.Darkness and becoming dark → See also blackout
(Definition of black sth out (NO LIGHT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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