# pi

^{1}

the 16th letter of the Greek alphabet (Π, π).

the consonant sound represented by this letter.

Mathematics.

the letter π, used as the symbol for the ratio of the circumference of a circle to its diameter.

the ratio itself: 3.141592+.

## Origin of pi

^{1}

## Words Nearby pi

## Other definitions for pi (2 of 5)

^{2}

### or pie

printing types mixed together indiscriminately.

any confused mixture; jumble.

to reduce (printing types) to a state of confusion.

to jumble.

## Origin of pi

^{2}

## Other definitions for PI (3 of 5)

Law. personal injury.

principal investigator.

Also P.I., p.i. private investigator.

## Other definitions for Pi. (4 of 5)

piaster.

## Other definitions for P.I. (5 of 5)

Philippine Islands.

Also PI, p.i. private investigator.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

## How to use pi in a sentence

Both PIs doubt unstable Tabor’s guilt, and as they explore his case, they mix it up with some of the more ice-in-their-veins denizens of the New York art scene.

Love suspense? Here are 5 new thrillers that will have you on the edge of your seat. | Richard Lipez | November 30, 2020 | Washington PostIn the end, they had PIs calculate the maximum number of researchers who could be in their lab at once, given the 160-square-feet rule, and divvy up the available hours as they saw fit.

In

*pi*, a numbers theorist named Max Cohen decides to put a power drill through his own brain.‘Noah’ Review: An Ambitious, Flawed Biblical Tale That You Have to See | Andrew Romano | March 28, 2014 | THE DAILY BEASTThey included Yann Martel, author of Life of

*pi*, and Calvin Trillin.Life of

*pi*immediately became the odds-on favorite to win, with more bets placed on it than any other Booker nominee ever.

She was Richard Parker in Life of

*pi*, a tiger who confusingly talked, and with an Indian accent, to boot.MTV Movie Awards 2013 Best Moments: Rebel Wilson & More (VIDEO) | Kevin Fallon | April 15, 2013 | THE DAILY BEASTPE, like fe, is another Hebrew letter, tho Greek and math people prefer their

*pi*better.National Scrabble Day: A Poem So You’ll Know All 101 Two-Letter Words | David Bukszpan | April 13, 2013 | THE DAILY BEAST"Quelle parole

*pi*paura d' inganno che speranza di futuro frutto mi porsero," he tells us in the Filocolo, ed.Giovanni Boccaccio, a Biographical Study | Edward HuttonAnd then

*pi*′tamakan went in and cut the ropes of eight horses, and safely led them out, making in all fifteen that she had taken.Blackfeet Tales of Glacier National Park | James Willard SchultzAnd so passed

*pi*′tamakan, virgin, and brave woman chief of our people.Blackfeet Tales of Glacier National Park | James Willard SchultzThe Blackfeet call such a place—there were several of them—a

*pi*′skan, a trap.Blackfeet Tales of Glacier National Park | James Willard Schultz*pi*′tamakan then ordered her followers to remain where they were and told the Blood chief to say the same thing to his men.Blackfeet Tales of Glacier National Park | James Willard Schultz

## British Dictionary definitions for pi (1 of 4)

^{1}

/ (paɪ) /

the 16th letter in the Greek alphabet (Π, π), a consonant, transliterated as p

maths a transcendental number, fundamental to mathematics, that is the ratio of the circumference of a circle to its diameter. Approximate value: 3.141 592…; symbol: π

## Origin of pi

^{1}

## British Dictionary definitions for pi (2 of 4)

^{2}

### pie

/ (paɪ) /

a jumbled pile of printer's type

a jumbled mixture

to spill and mix (set type) indiscriminately

to mix up

## Origin of pi

^{2}

## British Dictionary definitions for pi (3 of 4)

^{3}

/ (paɪ) /

British slang short for pious (def. 2), pious (def. 3)

## British Dictionary definitions for PI (4 of 4)

Philippine Islands

private investigator

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for pi

[ pī ]

An irrational number that has a numerical value of 3.14159265358979… and is represented by the symbol π. It expresses the ratio of the circumference to the diameter of a circle and appears in many mathematical expressions.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## Cultural definitions for pi

[ (peye) ]

The irrational number obtained by dividing the length of the diameter of a circle into its circumference. Pi is approximately 3.1416. The sign for pi is π.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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