headquarters in WordNet English dictionary

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