Noun potomac river has 1 sense
  1. Potomac, Potomac River - a river in the east central United States; rises in West Virginia in the Appalachian Mountains and flows eastward, forming the boundary between Maryland and Virginia, to the Chesapeake Bay
    --1 is a kind of river
    --1 is a part of
     West Virginia, Mountain State, WV; Maryland, Old Line State, Free State, MD; Virginia, Old Dominion, Old Dominion State, VA
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