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Definition of Ohio river
1. Noun. A river that is formed in western Pennsylvania and flows westward to become a tributary of the Mississippi River.
Exact synonyms: Ohio
Group relationships: America, The States, U.s., U.s.a., United States, United States Of America, Us, Usa
Generic synonyms: River
Group relationships: America, The States, U.s., U.s.a., United States, United States Of America, Us, Usa
Generic synonyms: River