Monongahela River(redirected from Lower Monongahela River)
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Mo·non·ga·he·la River(mə-nŏng′gə-hē′lə, -hā′-)
A river rising in northern West Virginia and flowing about 200 km (125 mi) generally north into southwest Pennsylvania, where it joins the Allegheny River at Pittsburgh to form the Ohio River.
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|Noun||1.||Monongahela River - a river that rises in northern West Virginia and flows north into Pennsylvania where it joins the Allegheny River at Pittsburgh to form the Ohio River|