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spillway

[spil-wey] /ˈspɪlˌweɪ/
noun
1.
a passageway through which surplus water escapes from a reservoir, lake, or the like.
Origin of spillway
1885-1890
1885-90; spill1 + way1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for spill way

spillway

/ˈspɪlˌweɪ/
noun
1.
a channel that carries away surplus water, as from a dam Also called wasteweir, spill
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for spill way

spillway

n.

1889, from spill + way.

Online Etymology Dictionary, © 2010 Douglas Harper
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7
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