Etymology

Noun

1. the state of being singular, distinct, peculiar, uncommon or unusual
2. a point where all parallel lines meet
3. a point where a measured variable reaches unmeasurable or infinite value
4. the value or range of values of a function for which a derivative does not exist
5. a point or region in spacetime in which gravitational forces cause matter to have an infinite density; associated with black holes
6. A proposed point in the technological future at which artificial intelligences become capable of augmenting and improving themselves, leading to an explosive growth in intelligence.