- AKA: ∞, Infinity, Infinite, Infty, Inf.
- See: Unbounded Interval.
- (WordNet, 2009) ⇒ http://wordnetweb.princeton.edu/perl/webwn?s=infinity
- S: (n) eternity, infinity (time without end)
- (Wikipedia, 2009) ⇒ http://en.wikipedia.org/wiki/Infinity
- Infinity (symbolically represented by ∞) refers to several distinct concepts – usually linked to the idea of "without end" – which arise in philosophy, mathematics, and theology.  The word comes from the Latin infinitas or "unboundedness."
- In mathematics, "infinity" is often used in contexts where it is treated as if it were a number (i.e., it counts or measures things: "an infinite number of terms") but it is a different type of "number" from the real numbers. Infinity is related to limits, aleph numbers, classes in set theory, Dedekind-infinite sets, large cardinals, Russell's paradox, non-standard arithmetic, hyperreal numbers, projective geometry, extended real numbers and the absolute Infinite.