Other forms: waterfalls
A waterfall is a river falling straight down over the edge of a cliff. A great waterfall, the waterfall roared, swim below the waterfall.
They form where hard rock lies over soft: the soft rock erodes from beneath and the fall retreats upstream, which is how Niagara has moved miles over eleven thousand years. Angel Falls in Venezuela is the tallest, at nearly a kilometre.
1nounwaterfallA river falling over the edge of a cliff.
“We walked behind the waterfall and got soaked by the spray.”
waterfall is a fall of water.
Old English waetergefeall is water plus fall.
Old English
wæterġefeall — waterfall
Middle English
waterfal
English, today
waterfall
From Middle English waterfal, waterfalle, from Old English wæterġefeall (“waterfall”), equivalent to water + fall. Cognate with West Frisian wetterfal (“waterfall”), Dutch waterval (“waterfall”), German Wasserfall (“waterfall”), Swedish vattenfall (“waterfall”).
Etymology from Wiktionary, CC BY-SA