Waterfall definitions

wô'tər-fôl', wŏt'ər-
A steep fall of water, as of a stream, from a height; cascade.
noun
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The definition of a waterfall is a steep cliff or incline down which water cascades.

Niagara Falls is an example of a waterfall.

noun
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A steep descent of water from a height; a cascade.
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A flow of water over the edge of a cliff.
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(figuratively) A waterfall-like outpouring of liquid, smoke, etc.
noun
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(technical, computing, slang) Waterfall model.
noun
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(intransitive) To fall like a waterfall.
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Origin of waterfall

From Middle English waterfal, waterfalle, from Old English wæterÄ¡efeall (“waterfall"), equivalent to water +"Ž fall. Cognate with West Frisian wetterfal (“waterfall"), Dutch waterval (“waterfall"), German Wasserfall (“waterfall"), Swedish vattenfall (“waterfall").