Definitions
1.nounThe 16th letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
2.nounAn irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265358979323846264338327950; usually written π.
3.nounMetal type that has been spilled, mixed together, or disordered.
4.verbTo spill or mix printing type.
5.adjectiveNot part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type."In computing, pi characters may be entered with special key combinations."