Niagara Falls

Short definition from Wiktionary

Proper noun

1. 1
   A waterfall in Niagara river, Niagara region, on the international border between Canada and United States, in both Ontario and New York state; Massive waterfalls located on the Niagara River.
2. 2
   A city in Niagara county, New York, United States; near the Falls.
3. 3
   A city in Niagara regional municipality, Ontario, Canada; near the Falls.
4. 4
   Synonym of Niagara (“a flood or inundation”).