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Definition of soundproof adjective from the Oxford Advanced Learner's Dictionary

soundproof

adjective
 
/ˈsaʊndpruːf/
 
/ˈsaʊndpruːf/
(also soundproofed)
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  1. made so that sound cannot pass through it or into it
    • a soundproof room
    Oxford Collocations DictionarySoundproof is used with these nouns:
    • box
    See full entry
See soundproof in the Oxford Advanced American Dictionary

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