radioactive fallout

See under fallout. Unabridged


the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
the particles themselves. Compare rainout.
an unexpected or incidental effect, outcome, or product: the psychological fallout of being obese.
effects; results: emotional fallout from a divorce.
Also, fall-out.

1945–50; noun use of verb phrase fall out Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
fallout (ˈfɔːlˌaʊt)
1.  the descent of solid material in the atmosphere onto the earth, esp of radioactive material following a nuclear explosion
2.  any solid particles that so descend
3.  informal side-effects; secondary consequences
4.  informal to quarrel or disagree
5.  (intr) to happen or occur
6.  military to leave a parade or disciplinary formation
sentence substitute
7.  military the order to leave a parade or disciplinary formation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"radioactive particles," 1950, from fall (v.) + out.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Radioactive fallout from the meltdown is still high.
As radioactive fallout spreads, nearby forests are decimated.
Radioactive fallout from the world's first two-party nuclear exchange would circulate around the world.
They are killing the planet with a rain of radioactive fallout which, in a year's time, will have completed its task.
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