Found 2 items, similar to main office.
English → English (WordNet) Definition: main office main office n : (usually plural) the office that serves as the administrative center of an enterprise; “many companies have their headquarters in New York” [syn: headquarters, central office, home office, home base]
English → English (gcide) Definition: main office main office \main office\ n. The office that serves as the administrative center of an enterprise, Syn: headquarters, central office, home office. [WordNet 1.5]