short for Niagara Falls. Used figuratively in this lecture. See Niagara Falls in this glossary. So now he looks like he's got a- floodgates of Niagara would open at any minute, see? -The Failed Case (27 Oct. 64)a torrent or flood. From Niagara Falls a large waterfall on the Niagara River between the state of New York in the United States and Ontario in Canada. The river is nearly a mile across at the falls and flows approximately 15 million cubic feet of water per minute over straightdrops ranging from 158 to 167 feet.Niagara Falls, a set of waterfalls, partly in Canada and partly in the United States, on the Niagara River. The river is nearly a mile across at the falls and flows approximately 15 million cubic feet of water per minute over straightdrops ranging from 158 to 167 feet. At times individuals have gone over the falls in a barrel, though few have survived the ordeal. The first successful attempt was made in 1901 by a 43-year-old woman, witnessed by thousands of spectators.short for Niagara Falls. Used figuratively in this lecture. See also Niagara Falls in this glossary.short for Niagara Falls. Used figuratively in this lecture. See Niagara Falls in this glossary.