1. state in the north central United States, bordered by Michigan, Lake Erie, Pennsylvania, West Virginia, Kentucky, and Indiana. Capital: Columbus. Population: 11,485,910 (2008 estimate).
Area: 116,096 sq km (44,825 sq mi)
2. river in E United States: major river of the eastern United States, originating from the confluence of two other rivers at Pittsburgh, Pennsylvania, and flowing southward to join the Mississippi at Cairo, Illinois. Length: 1,580 km (981 mi)
