(MPEG-1 Audio Layer II) An audio compression technology that is part of the MPEG-1 standard. Used in earlier Video CDs as well as digital broadcasting outside the U.S., MP2 provided the foundation for the widely used MP3 format. See MP3 and MPEG.
The file extension for audio data encoded in the Moving Picture Experts Group (MPEG) Audio Layer 2 format. See also MPEG-2.