ground zero

noun

1
: the point directly above, below, or at which a nuclear explosion occurs
2
: the center or origin of rapid, intense, or violent activity or change
broadly : center sense 2a
the party town that served as ground zero for those corporate … bashes Rich Eisen
3
: the very beginning : square one

Examples of ground zero in a Sentence

ground zero in the battle over immigration laws a city that was once ground zero for the insurance industry
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.
Sam Woodward More than two decades after the 9/11 attacks, first responders and survivors alike are still fighting for access to studies and treatments as so many continue to die from toxic exposures at ground zero. Sam Woodward, USA Today, 12 Sep. 2025 Decision-Making While all functions are being reshaped by AI, decision-making is ground zero. Expert Panel®, Forbes.com, 11 Sep. 2025 Scotland has been a kind of ground zero for restrictions on free speech rights for the pro-life community. Benjamin Weinthal, FOXNews.com, 7 Sep. 2025 The Cuckoo’s Nest/Zubie’s parking lot in Costa Mesa became ground zero for clashes between punks and cowboys. Matthew Wills, JSTOR Daily, 31 Aug. 2025 See All Example Sentences for ground zero

Word History

First Known Use

1946, in the meaning defined at sense 1

Time Traveler
The first known use of ground zero was in 1946

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Cite this Entry

“Ground zero.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ground%20zero. Accessed 16 Sep. 2025.

Kids Definition

ground zero

noun
1
: the site of a nuclear explosion
2
: the center of rapid, intense, or violent activity or change
3
: the very beginning : square one

More from Merriam-Webster on ground zero

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