pi

[ pahy ]

/ paɪ /

noun, plural pis.

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

1835–45; <Greek pî, peî; used in mathematics to represent Greek periphérion periphery

Words nearby pi

phytotherapy, phytotoxic, phytotoxin, phytotron, PHz, pi, Pia, pia-arachnitis, pia-arachnoid, Piacenza, piacevole

Definition for pi (2 of 5)

pi²

or pie

[ pahy ]

/ paɪ /

noun, plural pies.

printing types mixed together indiscriminately.

any confused mixture; jumble.

verb (used with object), pied, pi·ing.

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

to jumble.

Origin of pi

First recorded in 1650–60; origin uncertain

Definition for pi (3 of 5)

Law. personal injury.

principal investigator.

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

Definition for pi (4 of 5)

Pi.

or pi.

piaster.

Definition for pi (5 of 5)

P.I.

Philippine Islands.

Also PI, p.i. private investigator.

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for pi

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|DAILY BEAST
They included Yann Martel, author of Life of Pi, and Calvin Trillin.
The Second Life of San Miguel de Allende|Michele Willens|February 26, 2014|DAILY BEAST
Life of Pi immediately became the odds-on favorite to win, with more bets placed on it than any other Booker nominee ever.
The 12 Biggest Booker Prize Controversies|Thomas Flynn|July 23, 2013|DAILY BEAST
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|DAILY BEAST

PE, 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|DAILY BEAST
They do say that he was talking to Miss Walker about one of the faculty pews, and he said: 'Do you occupew this pi?'
Molly Brown's Sophomore Days|Nell Speed
Now Pi Hsi has raised the standard of rebellion in Chung-mou.
The Sayings of Confucius|Confucius
The office of the Eagle was in pi and its editor non est, which means nowhere—terrible excitement!
The Swamp Doctor's Adventures in The South-West|John Robb
And even Snooks, who had never been able to 112 gratify his dearest ambition of becoming a Pi Eta, felt their sting.
Harry Watson's High School Days|Frank V. Webster
Lastly are to be inserted the particles Al and Pi; which were in use among the antient Egyptians.
A New System; or, an Analysis of Antient Mythology. Volume I.|Jacob Bryant

British Dictionary definitions for pi (1 of 4)

pi¹

/ (paɪ) /

noun plural pis

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

Word Origin for pi

C18 (mathematical use): representing the first letter of Greek periphereia periphery

British Dictionary definitions for pi (2 of 4)

pi²

pie

/ (paɪ) /

noun plural pies

a jumbled pile of printer's type

a jumbled mixture

verb pies, piing, pied, pies, pieing or pied (tr)

to spill and mix (set type) indiscriminately

to mix up

Word Origin for pi

C17: of uncertain origin

British Dictionary definitions for pi (3 of 4)

pi³

/ (paɪ) /

adjective

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

British Dictionary definitions for pi (4 of 4)

abbreviation for

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

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.

Medical definitions for pi (1 of 3)

[ pī ]

n. pl. pis

The 16th letter of the Greek alphabet.

Medical definitions for pi (2 of 3)

The Greek letter pi. Entries beginning with this character are alphabetized under pi.

Medical definitions for pi (3 of 3)

[ pē′ī′ ]

n.

The pH value for the isoelectric point of a given substance in solution.

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.

单词	pi
释义	pi ¹ [ pahy ] / paɪ / noun, plural pis. 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 1835–45; <Greek pî, peî; used in mathematics to represent Greek periphérion periphery Words nearby pi phytotherapy, phytotoxic, phytotoxin, phytotron, PHz, pi, Pia, pia-arachnitis, pia-arachnoid, Piacenza, piacevole Definition for pi (2 of 5) pi² or pie [ pahy ] / paɪ / noun, plural pies. printing types mixed together indiscriminately. any confused mixture; jumble. verb (used with object), pied, pi·ing. to reduce (printing types) to a state of confusion. to jumble. Origin of pi ² First recorded in 1650–60; origin uncertain Definition for pi (3 of 5) PI Law. personal injury. principal investigator. Also P.I., p.i. private investigator. Definition for pi (4 of 5) Pi. or pi. piaster. Definition for pi (5 of 5) P.I. Philippine Islands. Also PI, p.i. private investigator. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for pi 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\|DAILY BEAST They included Yann Martel, author of Life of Pi, and Calvin Trillin. The Second Life of San Miguel de Allende\|Michele Willens\|February 26, 2014\|DAILY BEAST Life of Pi immediately became the odds-on favorite to win, with more bets placed on it than any other Booker nominee ever. The 12 Biggest Booker Prize Controversies\|Thomas Flynn\|July 23, 2013\|DAILY BEAST 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\|DAILY BEAST PE, 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\|DAILY BEAST They do say that he was talking to Miss Walker about one of the faculty pews, and he said: 'Do you occupew this pi?' Molly Brown's Sophomore Days\|Nell Speed Now Pi Hsi has raised the standard of rebellion in Chung-mou. The Sayings of Confucius\|Confucius The office of the Eagle was in pi and its editor non est, which means nowhere—terrible excitement! The Swamp Doctor's Adventures in The South-West\|John Robb And even Snooks, who had never been able to 112 gratify his dearest ambition of becoming a Pi Eta, felt their sting. Harry Watson's High School Days\|Frank V. Webster Lastly are to be inserted the particles Al and Pi; which were in use among the antient Egyptians. A New System; or, an Analysis of Antient Mythology. Volume I.\|Jacob Bryant British Dictionary definitions for pi (1 of 4) pi¹ / (paɪ) / noun plural pis 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 Word Origin for pi C18 (mathematical use): representing the first letter of Greek periphereia periphery British Dictionary definitions for pi (2 of 4) pi² pie / (paɪ) / noun plural pies a jumbled pile of printer's type a jumbled mixture verb pies, piing, pied, pies, pieing or pied (tr) to spill and mix (set type) indiscriminately to mix up Word Origin for pi C17: of uncertain origin British Dictionary definitions for pi (3 of 4) pi³ / (paɪ) / adjective British slang short for pious (def. 2), pious (def. 3) British Dictionary definitions for pi (4 of 4) PI abbreviation for 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 Content related to pi Where Did The Word”Pi” Come From?Pi is the Latin name of the sixteenth Greek letter, π. But, where did it come from? READ MORE Words related to pi sleuth, private investigator, private eye, gumshoe, private detective, detective, reporter, agent, spy, police officer, informer, prosecutor, cop, eavesdropper, tail, investigator, sleuthhound, flatfoot, dick, tracker Cultural definitions for pi 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. Medical definitions for pi (1 of 3) pi [ pī ] n. pl. pis The 16th letter of the Greek alphabet. Medical definitions for pi (2 of 3) π The Greek letter pi. Entries beginning with this character are alphabetized under pi. Medical definitions for pi (3 of 3) pI [ pē′ī′ ] n. The pH value for the isoelectric point of a given substance in solution. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for pi 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.
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pi

noun, plural pis.

Origin of pi

Words nearby pi

Definition for pi (2 of 5)

or pie

noun, plural pies.

verb (used with object), pied, pi·ing.

Origin of pi

Definition for pi (3 of 5)

Definition for pi (4 of 5)

or pi.

Definition for pi (5 of 5)

Example sentences from the Web for pi

British Dictionary definitions for pi (1 of 4)

noun plural pis

Word Origin for pi

British Dictionary definitions for pi (2 of 4)

pie

noun plural pies

verb pies, piing, pied, pies, pieing or pied (tr)

Word Origin for pi

British Dictionary definitions for pi (3 of 4)

adjective

British Dictionary definitions for pi (4 of 4)

abbreviation for

Content related to pi

Words related to pi

Cultural definitions for pi

Medical definitions for pi (1 of 3)

n. pl. pis

Medical definitions for pi (2 of 3)

Medical definitions for pi (3 of 3)

n.

Scientific definitions for pi