monongahela river is a noun meaning "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". It carries one recorded sense.
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
Definitions, synonyms and semantic relations for monongahela river come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.