- a county in N Northern Ireland. 804 sq. mi. (2,082 sq. km).
- its county seat: a seaport.
- a town in SE New Hampshire.
- a historical county of NW Northern Ireland, on the Atlantic: in 1973 replaced for administrative purposes by the districts of Coleraine, Derry, Limavady, and Magherafelt. Area: 2108 sq km (814 sq miles)
- a port in N Northern Ireland, second city of Northern Ireland: given to the City of London in 1613 to be colonized by Londoners; besieged by James II's forces (1688–89). Pop: 83 699 (2001)
