Niagara River n 1: a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York [syn: {Niagara}, {Niagara River}]
Niagara \Niagara\, Niagara River \Niagara River\prop. n. A river flowing from Lake Erie into Lake Ontario, which forms the boundary between Ontario and New York. [WordNet 1.5]