headquarters

Reading level: hard

Estimated CEFR level: B2 — Upper-Intermediate

Estimated from word frequency; not an official CEFR classification.

Definition

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

From head + quarters.

The teacher took her to headquarters. — Main Street, Sinclair Lewis
Shen-Yan's had been the East End headquarters. — The Insidious Dr. Fu Manchu, Sax Rohmer
"Headquarters in Seattle, I understand," says I. — Torchy and Vee, Sewell Ford

central office, main office, home office, home base

Type a word, a sentence, a book title, or a link to an English article. WordNet and the Classics answer.

Try

A library of classics · a vault of words · instant etymology & meaning