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.
The most dangerous scenario is one in which an Indian military response provokes a stronger Pakistani counterstrike, setting off a chain reaction that neither side can easily control. Sushant Singh, Foreign Affairs, 29 Apr. 2025 But just two days before the event, an unexpected crisis set off a chain reaction. Ashley Vega, People.com, 24 Apr. 2025 Similar to a butterfly effect, a loss event that happens in a specific industry or geography can create a chain reaction with wide repercussions. Vince Tizzio, Forbes.com, 16 Apr. 2025 As a result of the aging infrastructure and rising power consumption, the Grid is now more vulnerable to cascading failures, in which the failure of one component triggers a chain reaction of failures. Chuck Brooks, Forbes.com, 13 Apr. 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 19 May. 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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