a former province in Ireland, now comprising Northern Ireland and a part of the Republic of Ireland.
a province in N Republic of Ireland. 3,123 sq. mi. (8,090 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 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
C19: so called because it was first produced in Northern Ireland
An ulster is a long coat that was commonly worn in Victorian Britain. The overcoat that Sherlock Holmes usually wears in photos, movies, and TV shows is a good example of an ulster. This long, sturdy coat often has an attached cape and a belt, although more modern versions tend to omit the cape. These days, you're most likely to get a glimpse of an ulster on a period drama, like the TV series Sherlock or a filmed version of a Charles Dickens novel. The ulster wasn't a dressy type of outerwear; it was meant for a working man. The word comes from the name of the Irish province, Ulster, where these coats were originally made.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Hattersley also disbanded the B Specials, the controversial reserve police force, replacing it with the Ulster Defence Regiment.
From BBC • Jun. 14, 2026
BBC News NI has reported on a series of dumping incidents involving animal carcasses in the Mid Ulster area in recent months.
From BBC • Jun. 4, 2026
Back in 2010, a report published by Autism NI with Ulster University highlighted that the IQ threshold of 70 remained "a barrier to services for many families".
From BBC • Jun. 3, 2026
Doug Beattie has said he is "saddened and a little bit angry" after quitting the Ulster Unionist Party.
From BBC • Jun. 1, 2026
During the war for settler independence from Britain, the Ulster Scots were in the forefront of the struggle and formed the backbone of George Washington’s fighting forces.
From "An Indigenous People’s History of the United States" by Roxanne Dunbar-Ortiz
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
