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.
Zouk was ground zero for Los Angeles nightlife last weekend. Chris Gardner, The Hollywood Reporter, 18 Mar. 2025 The spot will likely be ground zero for fans wanting to snag the upcoming Nintendo Switch 2. Gieson Cacho, The Mercury News, 14 Mar. 2025 Related: How to See Greenland on a Quark Expeditions Cruise Greenland is considered ground zero for climate change: the Arctic is warming nearly four times faster than the rest of the world, and meltwater from the ice sheets and glaciers is the largest contributor to rising sea levels globally. Chloe Berge, Travel + Leisure, 13 Mar. 2025 Image The program, which now helps 137,000 members, was created by Congress in 2011 as part of the James Zadroga 9/11 Health and Compensation Act to provide treatment for emergency workers, cleanup crews and those living in Lower Manhattan who were sickened by airborne toxins at ground zero. Corey Kilgannon, New York Times, 20 Feb. 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 27 Mar. 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

Last Updated: - Updated example sentences
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