- a state in the central United States: a part of the Midwest. 56,290 sq. mi. (145,790 sq. km). Capital: Des Moines. Abbreviations: IA (approved esp. for use with zip code), Ia., Io.
- a river flowing southeast from northern Iowa to the Mississippi River. 291 miles (470 km) long.
- a member of an American Indian people originally of Iowa, Missouri, and Minnesota but now of Oklahoma, Nebraska, and Kansas.
- the Siouan language spoken by the Iowa Indians.
- a state of the N central US, in the Midwest: consists of rolling plains crossed by many rivers, with the Missouri forming the western border and the Mississippi the eastern. Capital: Des Moines. Pop: 2 944 062 (2003 est). Area: 144 887 sq km (55 941 sq miles)
