Definition of ground zero
- the party town that served as ground zero for those corporate … bashes
- —Rich Eisen
ground zero in the battle over immigration laws
a city that was once ground zero for the insurance industry
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.
: 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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