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MP3

 
pronunciation:
em pi thri
parts of speech:
abbreviation, noun
part of speech: abbreviation
definition: abbreviation of "Moving Pictures Expert Group, Audio Layer 3," an audio file format that compresses sound data, esp. music, for easy transfer over the internet, while providing high-quality playback sound.
 
part of speech: noun
definition 1: a piece of music in this format.
My favorite MP3s are in this folder.
definition 2: (l.c.) the file extension for an MP3 file.
I searched for the filename, "smog.mp3."