MP

MP [ ,em `pi ] noun count

1. ) Member of Parliament: someone who has been elected to represent people from a particular district in a PARLIAMENT:

MPs will vote on the Human Rights Bill this evening.

2. ) military police

MP3

MP 3 [ ,em pi `θri ] noun count or uncount COMPUTING

a method of reducing the size of a computer file that contains sound, especially music, so that it can be sent quickly by e-mail or over the Internet

a. a file produced by this method

MP3 player

MP`3 ,player noun count

a piece of equipment used for playing MP 3 files