headquarters

n. main command center, central command, center of operations

v. set up a center of operations; be set up in a center of operations

Headquarters (HQ) denotes the location where most, if not all, of the important functions of an organization are concentrated. The corporate headquarters is the entity at the top of a corporation taking full responsibility managing all business activities. In the UK, the term 'head office' is most commonly used for large corporations.
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Noun
1. (usually plural) the office that serves as the administrative center of an enterprise; "many companies have their headquarters in New York"
(synonym) central office, main office, home office, home base
(hypernym) office, business office
(hyponym) mukataa
(classification) plural, plural form
2. (usually plural) the military installation from which a commander performs the functions of command; "the general's headquarters were a couple of large tents"
(synonym) HQ, military headquarters
(hypernym) military installation
(hyponym) command post, general headquarters, GHQ
(classification) military, armed forces, armed services, military machine, war machine
(classification) plural, plural form
3. (plural) a military unit consisting of a commander and the headquarters staff
(hypernym) military unit, military force, military group, force
(hyponym) Allied Command Atlantic, ACLANT
(part-meronym) headquarters staff
(classification) military, armed forces, armed services, military machine, war machine
(classification) plural, plural form

(n. sing.)
The quarters or place of residence of any chief officer, as the general in command of an army, or the head of a police force; the place from which orders or instructions are issued; hence, the center of authority or order.
  

Synonyms and related words:
CP, GHQ, HQ, base, base of operations, booking office, box office, branch, branch office, cabinet, center of authority, central administration, central office, central station, chambers, chancellery, chancery, closet, command post, company headquarters, consulate, corporate headquarters, den, embassy, executive office, general headquarters, home office, legation, main office, office, seat, shop, study, ticket office