pl.n. (used with a sing. or pl. verb)
1. The offices of a commander, as of a military unit, from which orders are issued.
2. A center of operations or administration: The company has its headquarters in the suburbs.
Usage Note: The noun headquarters can be used with either a singular or a plural verb. The plural is more common: The corporation's headquarters are in Boston. But when referring to authority rather than physical location, many people prefer the singular: Division headquarters has approved the new benefits package.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.