/ Dictionary / Index S Sioux War: Meaning and Definition of Find definitions for: Sioux' War' Pronunciation: [key] — U.S. Hist. U.S. Hist. any of a series of skirmishes or wars between the Sioux Indians and settlers or the U.S. Army from 1854 to 1890. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sioux State sip Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language