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English definition of “junk”

junk

noun uk   /dʒʌŋk/ us  

junk noun (RUBBISH)

C1 [U] things that are considered to be of no use or value, or of low quality: We ought to clear out this cupboard - it's full of junk. I can't stand watching the junk that's on TV these days.

junk noun (DRUG)

[U] mainly US slang a dangerous drug, especially heroin

junk noun (SHIP)

[C] a Chinese ship with a flat bottom and square sails

junk

verb [T] uk   /dʒʌŋk/ informal us  
to get rid of something because it is of no use or value
(Definition of junk from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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