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rainout

[reyn-out] /ˈreɪnˌaʊt/
noun
1.
a contest, performance, or the like, that has been rained out.
2.
Also called washout. the removal of radioactive particles or other foreign substances from the atmosphere by precipitation.
Also, rain-out.
Compare fallout.
Origin
1945-1950
1945-50, Americanism; noun use of verb phrase rain out
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rain-out

rainout

/ˈreɪnˌaʊt/
noun
1.
radioactive fallout or atmospheric pollution carried to the earth by rain
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 rain-out
n.

also rain out, rainout, 1947, from rain (v.) + out (adv.). Of baseball games, to be rained out is attested from 1928.

Online Etymology Dictionary, © 2010 Douglas Harper
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4
5
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