pi
/paɪ/
An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265; The sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek; Metal type that has been spilled, mixed together, or disordered
- plural
- pis
Meanings
- 1
An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265
The famous number pi is approximately equal to 3.14159.
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- 2
The sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek
- 3
Metal type that has been spilled, mixed together, or disordered
- 4
pica (conventionally, 12 points = 1 pica, 6 picas = 1 inch)
- 5
Piaster