You searched for: “mp
MP (s) (noun), MPs (pl)
1. A branch of an armed-military force assigned to perform law enforcement duties: An MP is an equivalent to a civilian police officer; however, only MPs, or Military Police, are authorized to serve on military installations while civilian police are not.

An MP also indicates "mounted police" who ride horses when performing special duties as civilian police.

2. A member of a government group in such countries as Great Britain, Canada, etc.: The MP is a Member of Parliament which is the highest legislature in the UK consisting of the sovereign, the House of Lords, and the House of Commons.
This entry is located in the following unit: English Words in Action, Group M (page 4)
Word Entries at Word Info: “mp
military police, MP (pl) (noun)
Soldiers who are responsible for law and order in the armed forces: "Most military organizations have military policemen and military policewomen, who function to make sure that military rules are enforced on their bases."
This entry is located in the following units: -aster, -astering, -asterism, -astery, -astress, -astry (page 1) milit- (page 2)