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
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.
Teens are early adopters of the new technology, but they face higher risks because their brains, identities and critical-thinking skills are all still under development, said Dr. Nina Vasan, director at Stanford Medicine’s Brainstorm Lab.
From The Wall Street Journal • Nov. 20, 2025
But with the backing of thousands of ALS patients, Brainstorm took the rare step of “filing over protest,” essentially forcing the agency to render a decision.
From Seattle Times • Sep. 25, 2023
Brainstorm a few meals you can throw together with what you have on hand that won’t require you to open your fridge or freezer.
From Los Angeles Times • Aug. 18, 2023
That includes an experimental stem cell treatment from tiny drugmaker Brainstorm Cell Therapeutics.
From Washington Times • Apr. 25, 2023
C. Brainstorm: free association / stream of consciousness, web and cluster, outline.
From Sequential Problem Solving A Student Handbook with Checklists for Successful Critical Thinking by Lozo, Fredric
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.