Lisburn (/ˈlɪz.bərn/ or /ˈlɪs.bərn/; meaning "fort of the stream", probably from Irish lios, meaning 'fort', and Scots burn, meaning 'stream'[2]) is a city in Northern Ireland. It is 8 mi (13 km) southwest of Belfast city centre, on the River Lagan, which forms the boundary between County Antrim and County Down. Lisburn is part of the Belfast Metropolitan Area.