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.
Not only did both drivers lose the top positions, but the incident set off a chain reaction, causing a huge pile-up of cars behind them. Lee Habeeb, MSNBC Newsweek, 3 Apr. 2025 There are chain reactions, however, that could result in a player like running back Ashton Jeanty, tight ends Tyler Warren or Colston Loveland, or a wide receiver like Tetairoa McMillan being available. Nick Kosmider, New York Times, 27 Mar. 2025 One of the key points in the new study is that salty water can also trigger chain reactions in ecosystems that can impact drinking water quality, infrastructure, and energy and food production. Ars Technica, 19 Mar. 2025 Coach Ben was always going to meet his end at some point in Season 3 because, really, this sets off a chain reaction of everything that comes afterward — that eventually leads to all of the things that people are looking for answers to. Michaela Zee, Variety, 14 Mar. 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 13 Apr. 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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