- a contest, performance, or the like, that has been rained out.
- Also called washout. the removal of radioactive particles or other foreign substances from the atmosphere by precipitation.
Origin of rainout
1945–50, Americanism; noun use of verb phrase rain out
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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