waterfalls on the Niagara River, consisting of two principal parts separated by Goat Island: the Horseshoe Falls adjoining the west (Canadian) bank, which fall 47 m (158 ft), and the American Falls adjoining the east (American) bank, which fall 50 m (167 ft).
a city in upper New York State situated on the right bank of the Niagara River beside the Falls; population 51,345 (est. 2008).
a city in Canada, in southern Ontario, situated on the left bank of the Niagara River beside the Falls, opposite the city of Niagara Falls, US, to which it is linked by bridges; population 82,184 (2006).
Niagara Falls in other Oxford dictionaries
Definition of Niagara Falls in the US English dictionary