Meaning

noun (usually plural) the office that serves as the administrative center of an enterprise

noun the military installation from which a commander performs the functions of command

noun (plural) a military unit consisting of a commander and the headquarters staff

originEtymology tree Proto-Indo-European *kap- Proto-Indo-European *káput Proto-Germanic *haubudą Old English hēafod Middle English heed English head English quarters English headquarters From head + quarters.

Etymology from Wiktionary, CC BY-SA 3.0