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English definition of “ground zero”

ground zero

noun [U]
 
 
the exact place where a nuclear bomb explodesPlaces and locationsUnpleasant placesDetonation and bombardment
Ground Zero the place in New York City where the World Trade Center stood before it was destroyed in an attack on September 11, 2001Places and locationsUnpleasant places
(Definition of ground zero from the Cambridge Learners Dictionary © Cambridge University Press)
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