# PI

## Definition of PI

- (noun)the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
- (noun)the 16th letter of the Greek alphabet

- (noun)the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
- (noun)the 16th letter of the Greek alphabet