/ Dictionary / Index U ultranationalism: Meaning and Definition of Find definitions for: ul•tra•na•tion•al•ism Pronunciation: (ul"tru-nash'u-nl-iz"um), [key] — n. extreme devotion to or advocacy of the interests of a nation, esp. regardless of the effect on any other nations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ultranationalism (Thesaurus) ultramundane ultranationalist Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language