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overfall

noun
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Definition of overfall

1 : a turbulent surface of water caused by strong currents setting over submerged ridges or shoals or by winds opposing a current —usually used in plural
2 obsolete : cataract, waterfall
3 : a place provided for the overflow of surplus water (as from a canal or lock)
4 : a sudden increase of depth in the bottom of the sea or other large body of water

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“Overfall.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overfall. Accessed 25 Feb. 2021.

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