noun The state of being singular, distinct, peculiar, uncommon or unusual.
noun An unusual action or behaviour.
noun A point where all parallel lines meet.
noun A point where a measured variable reaches unmeasurable or infinite value.
noun The value or range of values of a function for which a derivative does not exist.
noun Ellipsis of gravitational singularity (“a point or region in spacetime in which gravitational forces cause matter to have an infinite density; associated with black holes”).
noun Ellipsis of technological singularity (“a hypothetical turning point in the future, the culmination of ever-accelerating technological progress, when human history as we have known it ends, and a strange new era begins. For some writers, the catalyst is superhuman machine intelligence”).