<p><strong>Noun</strong></p><ul><li>(used with a singular or plural verb) (plural: headquarters) 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.</li><li>the offices or working location of a military commander; the place from which a commander customarily issues orders.</li><li>a military unit consisting of the commander, his staff, and other assistants.</li></ul>