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: 281 000 (2011 est)
2.
a district of W Northern Ireland, in Co Antrim and Co Down. Pop: 268 700 (2010 est). Area: 115 sqkm (44 sq miles)
Belfast in American English
(ˈbɛlˌfæst; bɛlˈfæst)
seaport & capital of Northern Ireland, on the North Channel: pop. 284,000