butterfly effect

noun

: a property of chaotic systems (such as the atmosphere) by which small changes in initial conditions can lead to large-scale and unpredictable variation in the future state of the system

Examples of butterfly effect in a Sentence

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The question Ahamed was left with after his research is how Germany and France set off a butterfly effect in the 1870s. Nick Lichtenberg, Fortune, 2 June 2026 The original show's opening moments see its characters watching a Russian step on the moon, and that one historical change sets off a butterfly effect creating a whole new history for mankind. Kelly Lawler, USA Today, 30 Mar. 2026 Mostly, the film is about changing ways of life — those ways foisted and forced upon unsuspecting and innocent communities of both bears and people — and the butterfly effect that naturally (or, in some cases, unnaturally) follows. Kate Erbland, IndieWire, 24 Jan. 2026 Yes, of course, the butterfly effect exists, and a world where Aldridge blossoms into a franchise player in Chicago probably isn’t a world where the Bulls get to draft Derrick Rose — those odds were already impossibly slim. The Athletic Nba Staff, New York Times, 13 Jan. 2026 See All Example Sentences for butterfly effect

Word History

First Known Use

1976, in the meaning defined above

Time Traveler
The first known use of butterfly effect was in 1976

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Cite this Entry

“Butterfly effect.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/butterfly%20effect. Accessed 3 Jul. 2026.

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