What exactly is a gravitational singularity?

Question

What exactly is a gravitational singularity?

Answer 1

black holes

Answer 2

I do believe it is a gravitational force coming from an infinitesimal point in space. The only occurrences of this I know of are black holes and the Big Bang.

Since its infinitely small the gravity is infinite at that point.

Answer 3

The center of a black hole. It is the compressed remain of the star that formed it. It has virtually almost infinite gravity, not even light can escape it.

Answer 4

A Schwarzschild singularity has definition:  The center of a black hole. According to Einstein's theory of general relativity, the entire mass of a black hole is concentrated at a point at its center, the "singularity".