Wiktionary
n. Of a business, an office geographically separate from the headquarters of the business.
Wikipedia
A branch office is an outlet of a company or, more generally, and organization that – unlike a subsidiary – does not constitute a separate legal entity, while being physically separated from the organization's main office. Branching is particularly widespread in banking and other financial institutions, where the products' complexity requires local offices to act more like an agency than as a separate company. A branch structure exposes the owning company to full taxability and legal liability in regard to the branch office's operations.
Usage examples of "branch office".
Dries, after turning over his sector branch office, had been appointed Galactic Bank Liaison with the Earth Planetary Bank.
Before returning home he stopped at a branch office of the Ministry of Labour and was issued with a passport application form, at a toyshop where for fifteen shillings he bought a child's printing set, and at a post office for a one-pound postal order.
A complete audit of the local branch office's books showed no doctoring at all.
Tiffany's had a small branch office in Beverly Hills, but they didn't put expensive things in the windows at night.
With Glen, every small town in the United States has an FBI branch office, practically, and a lot of other places as well, like London in this country.