niagara falls is a noun meaning "waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls". It carries 2 recorded senses.
waterfall in Canada is the Horseshoe Falls; in the United States it is the American Falls
Definitions, synonyms and semantic relations for niagara falls come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.