ni·ag·a·ra \nīˈag(ə)rə, -aig-, attributively (ˈ) ̷ ̷| ̷ ̷( ̷ ̷) ̷ ̷\noun (-s) Usage: often capitalized Etymology: from Niagara Falls waterfall of the Niagara river between Ontario, Canada and New York State : an overwhelming flood : torrent < a niagara of curses > < a niagara of cheap fiction >