noun, plural headquarters. (used with a singular or plural verb)
a center of operations, as of the police or a business, from which
orders are issued; the chief administrative office of an organization
: The operatives were always in touch with headquarters.
the offices or working location of a military commander; the place from which a commander customarily issues orders.
a military unit consisting of the commander, his staff, and other assistants.
Origin: 1640–50; head Related forms
subheadquarters, noun, plural subheadquarters.