- a former province in Ireland, now comprising Northern Ireland and a part of the Republic of Ireland.
- a province in N Republic of Ireland. 3123 sq. mi. (8090 sq. km).
- Informal. Northern Ireland.
- (lowercase) a long, loose, heavy overcoat, originally of Irish frieze, now also of any of various other woolen cloths.
- a man's heavy double-breasted overcoat with a belt or half-belt at the back
Word Origin for ulster
- a province and former kingdom of N Ireland: passed to the English Crown in 1461; confiscated land given to English and Scottish Protestant settlers in the 17th century, giving rise to serious long-term conflict; partitioned in 1921, six counties forming Northern Ireland and three counties joining the Republic of Ireland. Pop (three Ulster counties of the Republic of Ireland): 46 714 (2002); (six Ulster counties of Northern Ireland): 1 702 628 (2003 est). Area (Republic of Ireland): 8013 sq km (3094 sq miles); (Northern Ireland): 14 121 sq km (5452 sq miles)
- an informal name for Northern Ireland
northernmost of the four provinces of Ireland, 14c., from Anglo-French Ulvestre (early 13c.), Anglo-Latin Ulvestera (c.1200), corresponding to Old Norse Ulfastir, probably from Irish Ulaidh "men of Ulster" + suffix also found in Leinster, Munster, and perhaps representing Irish tir "land."