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The United States National Guard is a reserve forces component of the United States Army (the Army National Guard) and the United States Air Force (the Air National Guard). Both are maintained through the National Guard Bureau, a semi-independent subordinate entity of the United States Department of Defense, whose Chief is a Lieutenant General.
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Noun
1. a civilian reserve component of the United States Army comprised of guardsmen who serve during overseas peacekeeping missions and during local emergencies
(synonym) Army National Guard
(hypernym) National Guard, home reserve
(part-holonym) United States Army, US Army, U. S. Army, USA
(classification) military, armed forces, armed services, military machine, war machine