Dictionary

MP3

noun \ˌem-(ˌ)pē-ˈthrē\

: a computer format for creating sound files (such as songs) that are much smaller than standard sound files

: a computer file (such as a song) in the MP3 format

Full Definition of MP3

1
:  a computer file format for the compression and storage of digital audio data
2
:  a computer file (as of a song) in the MP3 format

Examples of MP3

  1. downloading MP3s off the Internet

Origin of MP3

from the file extension .mp3 used for such files, short for MPEG Audio Layer 3
First Known Use: 1996

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