pi

PI

abbr.

private investigator

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pi ¹

 (pī)

n.

1. (also pē) The 16th letter of the Greek alphabet. See Table at alphabet.

2. Mathematics A transcendental number, approximately 3.14159, represented by the symbol π, that expresses the ratio of the circumference to the diameter of a circle and appears as a constant in many mathematical expressions.

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[Late Greek pī, from Greek pei, of Phoenician origin; see p in Semitic roots.]

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pi ²

also pie  (pī)Printing

n. pl. pis also pies

An amount of type that has been jumbled or thrown together at random.

v. pied (pīd), pi·ing, pies also pied, pie·ing, pies

v.tr.

To jumble or mix up (type).

v.intr.

To become jumbled.

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[Origin unknown.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pi

(paɪ)

n, pl pis

1. (Letters of the Alphabet (Foreign)) the 16th letter in the Greek alphabet (Π, π), a consonant, transliterated as p

2. (Mathematics) 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

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

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pi

(paɪ) or

pie

n, pl pies

1. (Printing, Lithography & Bookbinding) a jumbled pile of printer's type

2. a jumbled mixture

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

3. (Printing, Lithography & Bookbinding) to spill and mix (set type) indiscriminately

4. to mix up

[C17: of uncertain origin]

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pi

(paɪ)

adj

slang Brit short for pious², pious³

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PI

abbreviation for

1. (Placename) Philippine Islands

2. (Law) private investigator

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pi¹

(paɪ)

n., pl. pis.

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

2.

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

b. the ratio itself: 3.14159 +.

[1835–45; < Greek pî, peî; used in math to represent Greek periphérion periphery]

pi²

or pie

(paɪ)

n., pl. pies, n.

1. printing type mixed together indiscriminately.

2. any confused mixture; jumble.

v.t.

3. to jumble (printing type).

4. to mix up; jumble.

[1650–60; orig. uncertain]

P.I.

Philippine Islands.

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

pi

(pī)

An irrational number that has a numerical value of 3.14159265359... and is represented by the symbol π. It expresses the ratio of the circumference to the diameter of a circle and appears as a constant in many mathematical expressions.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pi

Past participle: pied
Gerund: piing

Imperative

pi

pi

Collins English Verb Tables © HarperCollins Publishers 2011

pi

(") Symbol and name representing the ratio of a circle’s circumference to its diameter. Its value is approximately 3.14.

Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited

Thesaurus

Noun	1.	pi - the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846... transcendental number - an irrational number that is not algebraic
	2.	PI - someone who can be employed as a detective to collect information private detective, private eye, private investigator, shamus, sherlock, operative detective - an investigator engaged or employed in obtaining information not easily available to the public hotel detective, house detective - a private detective employed by a hotel or retail store inquiry agent - a private detective store detective - a private detective employed by a merchant to stop pilferage
	3.	PI - the scientist in charge of an experiment or research project principal investigator scientist - a person with advanced knowledge of one or more sciences
	4.	pi - the 16th letter of the Greek alphabet Greek alphabet - the alphabet used by ancient Greeks alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"
	5.	PI - an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs protease inhibitor antiviral, antiviral agent, antiviral drug - any drug that destroys viruses drug cocktail, HAART, highly active antiretroviral therapy - a combination of protease inhibitors taken with reverse transcriptase inhibitors; used in treating AIDS and HIV Crixivan, indinavir - a protease inhibitor (trade name Crixivan) used for treating HIV nelfinavir, Viracept - a protease inhibitor (trade name Viracept) used in treating HIV usually in combination with other drugs Norvir, ritonavir - a protease inhibitor (trade name Norvir) used in treating HIV Invirase, saquinavir - a weak protease inhibitor (trade name Invirase) used in treating HIV

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

Translations

pí

Pi

πι

pi

erikoismerkkipii

pi

pí

pi greco

pi

pí

pi

pi

pi

[paɪ] N (pis (pl)) (Math) → pi f

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

PI

abbr of private investigator → Privatdetektiv(in) m(f)

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pi

n (Math) → Pi nt

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

pi

[paɪ] n (Math) → pi greco m

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995