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the state, fact, or quality of being singular

something distinguishing a person or thing from others

something remarkable or unusual

maths

1. a point at which a function is not differentiable although it is differentiable in a neighbourhood of that point See also pole 2

2. another word for discontinuity

astronomy a hypothetical point in space-time at which matter is infinitely compressed to infinitesimal volume

A point of infinite density and infinitesimal volume, at which space and time become infinitely distorted according to the theory of General Relativity. According to the big bang theory, a gravitational singularity existed at the beginning of the universe. Singularities are also believed to exist at the center of black holes.

Mathematics��A point at which the derivative does not exist for a given function but every neighborhood of which contains points for which the derivative exists.