A singularity, in the context of space, is a point in space-time where the density of matter and the gravitational field are infinite, forming a black hole. Light cannot escape a black hole, so it is assumed that everything else is also trapped (nothing we know of can pass the speed of light). Once inside the black hole, that is, beyond the event horizon, matter inside will continue to move around until it runs into the singularity and, barring all wormhole theories, is destroyed.
Created for submission to ^Aeires's fractal contest. (Feb 2006)