pi

8 definitions • 9 examples

the number (approximately 3.14) used to calculate the size of circles

the 16th letter of the Greek alphabet

abbreviation for private investigator: someone whose job is discovering information about people, but who is not a police officer or a government employee:

Some states allow PIs to carry firearms.

A PI had been hired to follow the judge’s family.

abbreviation for principal investigator: the person leading a scientific or engineering project:

The PI should be called if there is any question of re-irradiation.

abbreviation for profitability index: a measurement of how much profit a project is likely to make :

The PI is a way to evaluate a project’s potential return.

Typically PI is used to evaluate capital projects.

abbreviation for professional indemnity: a type of business insurance that protects against claims by customers:

Not having PI policies leaves professionals in danger of losing their personal assets and businesses to lawsuits.

Rates for PI insurance have rocketed.

abbreviation for personal injury: physical or mental harm that is caused to someone, especially when this is the fault of another person or an organization:

A PI trust can't be set up where the injuries were fatal.

The PI chiropractor specializes in car accident injuries.

a number that is the ratio (= comparison) of the distance around a circle to the distance across the circle, equal to about 3.14159