- a seaport in and capital of Northern Ireland, on the E coast.
- a political division of the United Kingdom, in the NE part of the island of Ireland. 5238 sq. mi. (13,565 sq. km). Capital: Belfast.
- the capital of Northern Ireland, a port on Belfast Lough in Belfast district, Co Antrim and Co Down: became the centre of Irish Protestantism and of the linen industry in the 17th century; seat of the Northern Ireland assembly and executive. Pop: 276 459 (2001)
- a district of W Northern Ireland, in Co Antrim and Co Down. Pop: 271 596 (2003 est). Area: 115 sq km (44 sq miles)
- that part of the United Kingdom occupying the NE part of Ireland: separated from the rest of Ireland, which became independent in law in 1920; remained part of the United Kingdom, with a separate Parliament (Stormont), inaugurated in 1921, and limited self-government; scene of severe conflict between Catholics and Protestants, including terrorist bombing from 1969; direct administration from Westminster from 1972; assembly and powersharing executive established in 1998–99 following the Good Friday Agreement of 1998, suspended in 2002, and reinstated 2007. Capital: Belfast. Pop: 1 702 628 (2003 est). Area: 14 121 sq km (5452 sq miles)
Capital, largest city, and major port of Northern Ireland.