county UK /ˈkaʊnti/US /ˈkaʊn(t)i/noun 4adjective 1forms 3 noun4 •a large piece of land run by its own council, forming one part of a country or a state •A definitive geographic region, without direct administrative functions. •(historical) The land ruled by a count or a countess.The first of the principalities of the Low Countries to take clear shape was the county of Flanders. — 2018 •(US, slang) A jail operated by a county government.He can't come; he's up in the county for agg assault. adjective1 •Characteristic of a ‘county family’; representative of the gentry or aristocracy of a county.Now, in the district around Chipping Carby, the County Families are very County indeed, few more so. — 1886 formscounties · more county · most county