/ Dictionary / Index O Ouachita: Meaning and Definition of Find definitions for: Ouach•i•ta Pronunciation: (wosh'i-tô", wô'shi-), [key] — pl. -tas, -ta a river flowing SE from W Arkansas through NE Louisiana to the Red River. 605 mi. (975 km) long. a member of a former North American Indian tribe, apparently of the Caddoan stock, of NE Louisiana. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ouachita (Thesaurus) ouabain Ouachita Mountains Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language