"The point directly above, below, or at which a nuclear explosion occurs" (Merriam-Webster). Recently thanks to a load of rhetoric from our idiot newscasters, the meaning has been horribly trivialized.

Hiroshima (80,000 deaths from the explosion + additional 60,000 deaths from radiation poisoning) is a "ground zero". Nagasaki (120,000 deaths total) is a "ground zero". The World Trade Center (2749 deaths) is NOT a "ground zero". So stop calling it that.

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)

A popular guess of Katsuki Kacchan Bakugou’s hero name.

A state of being wherein you feel as if you cannot sink any lower emotionally, psychologically, or physically.

Hitting rock bottom.

The absolute lowest possible point or level. The place a person in denial must reach before he finally is ready to admit that he has a problem and reaches out for help

....but hey, when you cant get any lower, the only way to go is up.

The epicenter of a disaster or explosion.

Currently, the term is most commonly used in reference to the location of the World Trade Center after the September 11th attacks.

To reset a conversation, object or situation to it's original or prior form. Especially if the given situation is extremely undesirable.

Lots of people dont know it, but ground zero is also a music festival of harder styles of music. Hardcore music, Terror, Hardstyle, its all to be heard there. its a festival in the Bussloo area in the Netherlands and its being held once every year.