The Collaborative International Dictionary of English v.0.48:
HQ \HQ\ n. [acronym] Headquarters, the place from which a commander performs the functions of command. Syn: headquarters, military headquarters. [WordNet 1.5]WordNet (r) 3.0 (2006):
HQ n 1: the military installation from which a commander performs the functions of command; "the general's headquarters were a couple of large tents" [syn: headquarters, HQ, military headquarters]