A branch of a designated US-based post office such as New York, San Francisco, Miami, or Seattle established by US Postal Service authority and operated by one of the Military Services. The term includes Army, Air Force, Navy, Marine Corps, and established Coast Guard post offices Also called MPO.
MILITARY POST OFFICE
Meaning of MILITARY POST OFFICE in English
DOD English dictionary of military terms. Английский словарь военных терминов DOD. 2012