home office is a noun meaning "the government department in charge of domestic affairs". It carries 2 recorded senses.
the government department in charge of domestic affairs
(usually plural) the office that serves as the administrative center of an enterprise
“many companies have their headquarters in New York”
plural
Definitions, synonyms and semantic relations for home office come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.