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stereo

noun
 
 
/ˈster.i.əʊ/ US  /-oʊ/

Definition

[U] a way of recording or playing sound so that it is separated into two signals and produces more natural sound: The concert will be broadcast in stereo.Recording sounds and images [C] a piece of electrical equipment for playing music, listening to the radio, etc. that sounds very natural because the sounds come out of two speakers (= parts for playing sound)Audio and video equipment stereo
 
 
adjective (formal stereophonic)
a stereo system → Compare mono noun, quadraphonicRecording sounds and images
(Definition of stereo noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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