[ uhl-ster ]
See synonyms for Ulster on Thesaurus.com
  1. a former province in Ireland, now comprising Northern Ireland and a part of the Republic of Ireland.

  2. a province in N Republic of Ireland. 3,123 sq. mi. (8,090 sq. km).

  1. Informal. Northern Ireland.

  2. (lowercase) a long, loose, heavy overcoat, originally of Irish frieze, now also of any of various other woolen cloths.

Other words from Ulster

  • Ul·ster·ite [uhl-stuh-rahyt], /ˈʌl stəˌraɪt/, noun

Words Nearby Ulster

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use Ulster in a sentence

British Dictionary definitions for ulster (1 of 2)


/ (ˈʌlstə) /

  1. a man's heavy double-breasted overcoat with a belt or half-belt at the back

Origin of ulster

C19: so called because it was first produced in Northern Ireland

British Dictionary definitions for Ulster (2 of 2)


/ (ˈʌlstə) /

  1. 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)

  2. an informal name for Northern Ireland

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for Ulster


A historic division of Ireland, located in the northeastern part of the island. Six of its nine counties are in Northern Ireland. (See Republic of Ireland.)

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.