pi
Proposed by a contributor, not yet supported by evidence.
Also seen as: pis · pies · piing · pied
Sense 1
The sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 3
Metal type that has been spilled, mixed together, or disordered.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 4
To spill or mix printing type.
Verb
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “pi” mean?
The sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
Is “pi” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.