brainstorm
Americannoun
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a sudden impulse, idea, etc..
Her most recent brainstorm of teaching her dog to surf wasn’t met with much enthusiasm from the dog.
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Chiefly British Informal. a fit of mental confusion or excitement.
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a session of brainstorming.
adjective
verb (used without object)
verb (used with object)
noun
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a severe outburst of excitement, often as the result of a transitory disturbance of cerebral activity
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informal a sudden mental aberration
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informal another word for brainwave
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of brainstorm
First recorded in 1890–95; brain + storm; originally a manifestation of a serious psychiatric disorder
Explanation
As you would expect, the word brainstorm involves thought. A brainstorm can be an "Aha!" moment, while brainstorming is the process of trying to think of ideas. If you've ever needed to find a topic for a paper and have just started listing every idea coming to you, you know what it's like to brainstorm. People brainstorm when they need a new idea. You can also say you had a brainstorm when a good idea or solution occurs to you. Often, this kind of brainstorm happens when you're not even working on the problem. For example, a scientist might have a brainstorm for a new project in the shower.
Vocabulary lists containing brainstorm
Jim Burke's Academic Vocabulary List
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TEKS ELAR Academic Vocabulary List (5th-7th grades)
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Expository Writing, List 1
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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:
They didn’t get to figure out that they wanted a horn section or brainstorm on what visuals, lighting and pyrotechnics would add to their show.
From Salon ● Jun. 23, 2026
On other social platforms like YouTube, the topic of leavers' shirts has filled feeds with DIY vlogs documenting designs, while users on Reddit brainstorm last-minute ideas.
From BBC ● Jun. 6, 2026
It can serve as a place to brainstorm or even draft an early version of a press release “as long as there is a significant, significant editing process,” he says.
From Barron's ● Apr. 14, 2026
Designers also brainstorm with AI by describing ideas that are generated into mood boards.
From The Wall Street Journal ● Jan. 23, 2026
Lina had the brainstorm to stop at Carvel on our way home, which felt like a very “springtime” thing to do, so we walked in the opposite direction up Amesfort toward the park.
From "Auggie & Me" by R. J. Palacio
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Here are some of the brainstorms they wished for.
From The Wall Street Journal ● Jun. 29, 2026
But not all of Marlon’s brainstorms were so outré, and here is the Brando’s principal innovative success.
From Los Angeles Times ● Mar. 20, 2024
Researchers are just beginning to test some of the ideas generated by these brainstorms.
From Scientific American ● Jul. 18, 2023
Glimcher added that it was getting difficult to tell his father that there was no room for his brainstorms.
From New York Times ● Jan. 19, 2022
I picture Grandma weaving the threads together, humming and chuckling while she brainstorms the next mind-bending story she’s going to tell me about Ghana.
From "Kwame Crashes the Underworld" by Craig Kofi Farmer
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.