Pronunciation: (ī'u-wu; sometimes ī'u-wā"), [key]
—pl. -was, (esp. collectively) -wa for 3.
1. a state in the central United States: a part of the Midwest. 2,913,387; 56,290 sq. mi. (145,790 sq. km). Cap.: Des Moines. Abbr.: IA (approved esp. for use with zip code), Ia., Io.
2. a river flowing SE from N Iowa to the Mississippi River. 291 mi. (470 km) long.
3. a member of an American Indian people originally of Iowa, Missouri, and Minnesota but now of Oklahoma, Nebraska, and Kansas.
4. the Siouan language spoken by the Iowa Indians.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.