MP3Pronunciation: /ɛmpiːˈθriː/Definition of MP3 noun [mass noun] a means of compressing a sound sequence into a very small file, to enable digital storage and transmission. [count noun] a file in MP3 format:technicalities aside, ripping your own MP3s is easy [as modifier]:an MP3 fileOrigin: 1990s: from MPEG + Audio Layer-3MP3 in other Oxford dictionaries Definition of MP3 in the US English dictionary
