Monongahela
geographical name
Mo·non·ga·he·la
| \ mə-ˌnän-gə-ˈhē-lə
, -ˌnäŋ-gə-, -ˈhā-lə\
, -ˌnäŋ-gə-, -ˈhā-lə\
Definition of Monongahela
river 128 miles (206 kilometers) long in northern West Virginia and southwestern Pennsylvania flowing north and uniting with the Allegheny River at Pittsburgh to form the Ohio River