/ Dictionary / Index U Ulster: Meaning and Definition of Find definitions for: Ul•ster Pronunciation: (ul'stur), [key] — n. a former province in Ireland, now comprising Northern Ireland and a part of the Republic of Ireland. a province in N Republic of Ireland. 229,720; 3123 sq. mi. (8090 sq. km). See (l.c.) a long, loose, heavy overcoat, originally of Irish frieze, now also of any of various other woolen cloths. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ulster (Thesaurus) Ulsan Ulsterman Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language