[oh-hahy-oh] 
| 1. | a state in the NE central United States: a part of the Midwest. 10,797,419; 41,222 sq. mi. (106,765 sq. km). Capital: Columbus. Abbreviation: OH (for use with zip code), O. |
| 2. | a river formed by the confluence of the Allegheny and Monongahela rivers, flowing SW from Pittsburgh, Pa., to the Mississippi in S Illinois. 981 mi. (1580 km) long. |
| O·hi·o (ō-hī'ō) A state of the north-central United States in the Great Lakes region. It was admitted as the 17th state in 1803. In prehistoric times Mound Builders inhabited the region, which was first explored by La Salle in 1669. The French-British rivalry for control of the area led to the last of the French and Indian Wars (1754-1763), in which the French were defeated. Ohio was part of the vast area ceded to the United States by the Treaty of Paris in 1783 and became part of the Old Northwest by the Ordinance of 1787. It became a separate territory in 1799. Columbus is the capital and Cleveland the largest city. Population: 11,500,000. O·hi'o·an adj. |
State in the northern United States bordered by Michigan and Lake Erie to the north, Pennsylvania and West Virginia to the east, West Virginia and Kentucky to the south, and Indiana to the west. Its capital is Columbus, and its largest city is Cleveland.
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