mushroom cloud

American

noun

mushroom.

mushroom cloud British

noun

the large mushroom-shaped cloud of dust, debris, etc produced by a nuclear explosion

"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

Etymology

Origin of mushroom cloud

First recorded in 1940–45

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

mushroom cloud

Footage shows the towering rocket erupt in an inferno, followed by a mushroom cloud of smoke as bystanders gathered to watch the launch gasp "Oh no!" and "Oh my God!"

From Barron's ● May 29, 2026

Harry Truman’s legacy froze the moment the mushroom cloud rose over Hiroshima.

From The Wall Street Journal ● Jan. 16, 2026

Federal investigators later concluded that the open burn and the black mushroom cloud it produced were unnecessary, but it was too late.

From Salon ● Oct. 5, 2024

Shortly after, a second blast sent a mushroom cloud billowing into the sky, rocking the forecourt in Crevedia.

From BBC ● Aug. 26, 2023

The men saw a purple-gray mushroom cloud rising above Hiroshima, its top reaching three miles above their plane.

From "Bomb" by Steve Sheinkin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023