MP3 Definition in the Cambridge English Dictionary
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Definition of “MP3” - English Dictionary

Definition of "MP3" - British English Dictionary

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MP3noun [C or U]

uk   us   /ˌem.piːˈθriː/ trademark
a ​computer file that ​stores high-quality ​sound in a ​smallamount of ​space, or the technology that makes this ​possible: I ​downloadedtheirlatestalbum on MP3.
(Definition of MP3 from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "MP3" - Business English Dictionary

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MP3noun [C or U]

uk   us   /empiːˈθriː/ IT
a ​computerfile that ​stores high-quality ​sound in a ​smallamount of ​space, or the ​technology that makes this possible: an MP3 ​file/​download/​device MP3 ​technology/​format
(Definition of MP3 from the Cambridge Business English Dictionary © Cambridge University Press)
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