proliferate
Americanverb (used with or without object)
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to grow or produce by multiplication of parts, as in budding or cell division, or by procreation.
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to increase in number or spread rapidly and often excessively.
verb
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to grow or reproduce (new parts, cells, etc) rapidly
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to grow or increase or cause to grow or increase rapidly
Other Word Forms
- proliferative adjective
Etymology
Origin of proliferate
First recorded in 1870–75; prolifer(ous) + -ate 1
Explanation
When something proliferates, it's growing, spreading or multiplying really quickly. Bunny rabbits have a habit of proliferating, as do dandelions in untended gardens and funny YouTube videos on the internet. Proliferate was originally a biological term used to describe the growth of cells and producing offspring. It wasn’t until 1961 that we started to use proliferate more generally to talk about everything from the spread of nuclear weapons to the wide growth of Walmart. Other similar words include expand, reproduce, snowball, and spawn.
Vocabulary lists containing proliferate
Essential Academic Vocabulary for High School Students, List 1
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The Vernal Vocabulary of Spring
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Just Mercy
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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.
“Given the rate of AI progress, it will not be long before such capabilities proliferate, potentially beyond actors who are committed to deploying them safely,” the company said.
From MarketWatch • Apr. 11, 2026
There have also been concerns that bad actors have also seized on the restrictions placed on Iranian imagery to proliferate fakes online.
From BBC • Apr. 11, 2026
“Many of our partners had been asking us to work on this feature for years,” Loike said, noting that flash floods can proliferate “often within minutes” of intense rainfall.
From The Wall Street Journal • Mar. 12, 2026
Wider, diverse sets of genres make films like these all the more appealing to audiences, and in turn, proliferate the public discussion and dissection of these movies as time goes on.
From Salon • Jan. 23, 2026
But a bok- anovskified egg will bud, will proliferate, will divide.
From "Brave New World" by Aldous Huxley
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.
