The target of a projectile, particularly a missile or bomb.
your website right here, directly above, or at the point of detonation of a nuclear gun.
The center of rapid or intense development or change: "The neighborhood scarcely existed five years ago, but today it is the ground zero from which designer shops and restaurants radiate” ( Robert Clark).
The starting point or most rudimentary amount: My client didn't like my initial styles, therefore I gone back to floor zero.
the purpose in the land or water area below, above, or where an atomic or nuclear bomb detonates
The location of every catastrophe
the mark of a projectile (as a bomb or missile)
your website of the World Trade Center before it was damaged
the idea of detonation (or above or below) of a nuclear weapon