Ohio River

Ohio River

A river formed by the confluence of the Allegheny and Monongahela Rivers in western Pennsylvania and flowing about 1,580 km (980 mi) to the Mississippi River at Cairo in southern Illinois. The British and French contested control of the river until 1763. The region was ceded to the United States at the end of the Revolutionary War (1783).

Thesaurus

Noun

1.

Ohio River - a river that is formed in western Pennsylvania and flows westward to become a tributary of the Mississippi RiverOhioU.S.A., United States, United States of America, US, USA, America, the States, U.S. - North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776