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According to WordNet, the noun "Niagara" has 2 sense(s).
109370773 waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls.
109370552 a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York.
- SUMO Mappings: River (instance mapping)
Explore the word Niagara on the WordNet web site.
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