ground zero

noun
Updated on: 20 Nov 2017

Definition of ground zero

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 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

  1. ground zero in the battle over immigration laws

  2. a city that was once ground zero for the insurance industry

Recent Examples of ground zero from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ground zero.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of ground zero

1946


GROUND ZERO Defined for English Language Learners

ground zero

noun

Definition of ground zero for English Language Learners

  • : the point on the earth's surface directly above, below, or at which an explosion (especially a nuclear explosion) occurs

  • : the central point in an area of fast change or intense activity

  • : the beginning state or starting point


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