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.
In 1987, Gutfeld graduated from Berkeley, ground zero for the Marxist opposition to the Ronald Reagan regime. Tatiana Siegel, Variety, 19 Feb. 2025 Mississippi Delta Clarksdale is ground zero, a town with numerous juke joints (blues music venues) where the Delta spawned such legends as John Lee Hooker, Muddy Waters, Ma Rainey, Howlin’ Wolf and B.B. King. Gqlshare, Orange County Register, 19 Feb. 2025 The Gaza Strip – ground zero of Israel's war with Hamas – is only about twice the size of Washington, DC. NPR, 12 Feb. 2025 Trump’s border czar Tom Homan designated Chicago — the nation’s third-largest city — as ground zero for his plans to round up immigrants in the country illegally and other groups at an unprecedented scale. Chicago Tribune, 28 Jan. 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 3 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

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