Definition
Ground zero originally referred to the point on the Earth's surface directly below or above a nuclear detonation. Now, it is more broadly used to describe the site of a devastating event, such as a bombing or natural disaster. Think of it as the epicenter of destruction, where the impact was most severe. Ground zero often becomes a place of mourning and remembrance. Unlike a disaster relief center, which provides aid, ground zero is the actual site of the devastation.