headquarters (n.)(usually plural) the office that serves as the administrative center of an enterprise;
many companies have their headquarters in New York
Synonyms: central office / main office / home office / home base
headquarters (n.)the military installation from which a commander performs the functions of command;
the general's headquarters were a couple of large tents
Synonyms: hq / military headquarters
headquarters (n.)(plural) a military unit consisting of a commander and the headquarters staff;