From Longman Dictionary of Contemporary EnglishForeign Office, thethe Foreign OfficeˈForeign ˌOffice, the (also the Foreign and Commonwealth Office) PGOthe British government department that is responsible for dealing with matters concerning other countries
Examples from the Corpus
Foreign Office, the• And her husband was in the Foreign Office, wasn't he?• Our head of bureaux suggested they ring the Foreign Office.• Another backbencher was told his place on a Foreign Office organised trip would be withdrawn if he defied the Government. 