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.
Restoring power proved to be more problematic in the country's north, where a fault in a backbone transmission line first triggered the outage that set off a chain reaction of power plant and transmission line shutdowns across the South American nation. Nayara Batschke and Matias Basualdo The Associated Press, arkansasonline.com, 27 Feb. 2025 All the destruction and loss were part of chain reactions that fire investigators are now trying to trace back to their incandescent origins. Ryan Fonseca, Los Angeles Times, 14 Jan. 2025 As collisions create more debris, the risk of further impacts grows exponentially, potentially leading to a chain reaction that could make certain orbital ranges unusable for generations. Tribune Content Agency, The Mercury News, 31 Dec. 2024 His car slowed down, causing a chain reaction behind him that eventually led to a crash which knocked several cars out of the race. Kevin Dotson, CNN, 16 Feb. 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

Browse Nearby Words

Cite this Entry

“Chain reaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chain%20reaction. Accessed 6 Mar. 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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