Meaning of pi

Definition of pi

(noun) the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...
someone who can be employed as a detective to collect information
the scientist in charge of an experiment or research project
the 16th letter of the Greek alphabet
an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs

Other information on pi

WIKIPEDIA results for pi
Amazon results for pi