Pronunciation: (ī'u-wu; sometimes ī'u-wā"),[key] —n., —pl.-was,(esp. collectively)-wafor 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.