From Longman Dictionary of Contemporary EnglishMPMP /ˌem ˈpiː/ ●●○ noun [countable] 1 PGOPGP (Member of Parliament) someone who has been elected to a parliament to represent people from a particular area of the country Ken Newton, MP a Labour MPMP for She’s one of the MPs for Liverpool.2 informalPM a member of the military policeFrom Longman Business DictionaryMPMP noun [countable] Member of Parliament; someone who has been elected to represent the people in the HOUSE OF COMMONS, the lower part of the parliament of Britain and Canadaa Labour MPA significant number of MPs have second careers in City boardrooms.