fallout

or fall-out

[ fawl-out ]
/ ˈfɔlˌaʊt /

noun

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.

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Origin of fallout

First recorded in 1945–50; noun use of verb phrase fall out

Definition for fall out (2 of 2)

Origin of fall

before 900; Middle English fallen, Old English feallan; cognate with German fallen, Old Norse falla; akin to Lithuanian pùlti to fall

OTHER WORDS FROM fall

un·fall·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for fall out (1 of 3)

Fall
/ (fɔːl) /

noun

the Fall theol Adam's sin of disobedience and the state of innate sinfulness ensuing from this for himself and all mankindSee also original sin

British Dictionary definitions for fall out (2 of 3)

fall
/ (fɔːl) /

verb falls, falling, fell (fɛl) or fallen (ˈfɔːlən) (mainly intr)

noun

Word Origin for fall

Old English feallan; related to Old Norse falla, Old Saxon, Old High German fallan to fall; see fell ²

British Dictionary definitions for fall out (3 of 3)

fallout
/ (ˈfɔːlˌaʊt) /

noun

the descent of solid material in the atmosphere onto the earth, esp of radioactive material following a nuclear explosion
any solid particles that so descend
informal side-effects; secondary consequences

verb fall out (intr, adverb)

sentence substitute

military the order to leave a parade or disciplinary formation
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

Idioms and Phrases with fall out (1 of 2)

fall out

1

Leave one's place in military ranks, as in After inspection they were ordered to fall out. [First half of 1800s]

2

Also, have a falling-out. Disagree, quarrel, as in The brothers fell out over their inheritance, or They no longer speak—they had a falling-out some years ago. [First half of 1500s]

3

Happen, result, as in Let us know how it falls out in the end. [Second half of 1500s]

Idioms and Phrases with fall out (2 of 2)

fall

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.