chain reaction

noun

1
a
: a series of events so related to each other that each one initiates the next
b
: a number of events triggered by the same initial event
2
: a self-sustaining chemical or nuclear reaction yielding energy or products that cause further reactions of the same kind
chain-react intransitive verb

Examples of chain reaction in a Sentence

Increased oil prices could trigger a chain reaction in the economy.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That was the moment this tiny puppy's life changed forever, setting off a chain reaction of events that ultimately came to the attention of CUDDLY, a fundraising and wish list platform sending aid and supplies to nonprofit animal rescues and dogs like Manzanita. Kristan Hawkins, Newsweek, 6 Feb. 2025 Salk Institute Investigating the mechanisms involved in periods of fasting, when the stomach and brain communicate to promote the secretion of a growth hormone directed at muscle cells, the researchers discovered that this chain reaction reduced BCL6 levels. New Atlas, 24 Jan. 2025 The Big Ten’s challenge will be staying a step ahead at a time when conference realignment — a chain reaction sparked by moves made by both the Big Ten and SEC — congressional legislation and NCAA rules changes have destabilized the structure of collegiate sports. Andrew Greif, NBC News, 21 Jan. 2025 In the basement, a worker mistakenly raised a few of the control rods that can reduce and, if necessary, completely shut down the chain reaction in the reactor. Ian Austen, New York Times, 4 Jan. 2025 See all Example Sentences for chain reaction 

Word History

First Known Use

1892, in the meaning defined at sense 1a

Time Traveler
The first known use of chain reaction was in 1892

Dictionary Entries Near chain reaction

Cite this Entry

“Chain reaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chain%20reaction. Accessed 10 Feb. 2025.

Kids Definition

chain reaction

noun
1
: a series of events so related to each other that each one sets the next one going
2
: a chemical or nuclear reaction producing energy or products that cause further reactions of the same kind

Medical Definition

chain reaction

noun
: a self-sustaining chemical or nuclear reaction yielding energy or products that cause further reactions of the same kind

More from Merriam-Webster on chain reaction

Last Updated: - Updated example sentences
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