Singularity (sing-gyuh-LAR-i-tee) noun 1. The quality or condition of being singular. 2. A trait marking one as distinct from others; a peculiarity. 3. Something uncommon or unusual. 4. Astrophysics.
A point in space-time at which gravitational forces cause matter to have infinite density and infinitesimal volume, and space and time to become infinitely distorted. 5. Mathematics. A point at which the derivative does not exist for a given function of a random variable but every neighborhood of which contains points for which the derivative exists. In this sense, also called singular point. [Middle English singuler, from Old French, from Latin singularis, from singulus, single.]