π 

1: Pi (π) is the 16th letter of the modern Greek alphabet.

2: An irrational number equal to the circumference of any circle divided by its radius; 3.14159...

3. In Greek numerals, used to represent the number 80.

1: πίτα είναι καλό.

2: The approximate value of pie is 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593344612847564823378678316527120190914564856692346034861045432664821339360726024914127372458700660631558817488152092096282925409171536436789259036001133053054882046652138414695194151160943305727036575959195309218611738193261179310511854807446237996274956735188575272489122793818301194912983367336244065664308602139494639522473719070217986094370277053921717629317675238467481846766940513200056812714526356082778577134275778960917363717872146844090122495343014654958537105079227968925892354201995611212902196086403441815981362977477130996051870721134999999837297804995105973173281609631859502445945534690830264252230825334468503526193118817101000313783875288658753320838142061717766914730359825349042875546873115956286388235378759375195778185778053217122680661300192787661119590921642019893809525720106548586327886593615338182796823030195203530185...

3. π = 80

π by kittens Σ:3 July 1, 2014

π 

3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989380952572010654858632788659361533818279682303019520353018529689957736225994138912497217752834791315155748572424541506959508295331168617278558890750983817546374649393192550604009277016711390098488240128583616035637076601047101819429555961989467678374494482553797747268471040475346462080466842590694912933136770289891521047521620569660240580381501935112533824300355876402474964732639141992726042699227967823547816360093417216412199245863150302861829745557067498385054945885869269956909272107975093029

Me: π is around 3.1415926535897932... um, I forgot the rest
Urban dictionary: say no more

π by HyperBeast43 May 26, 2018

π 

A number that is arguably born with a lucky star due to its popularity or idolatry among mathematicians, who devoted an obscene number of years trying to unearth its allegedly manifold beautiful properties, much to the envy of thousands of fellow rational and irrational numbers, who see themselves as a nobody in the numerical world.

Besides a few lucky numbers like e, i, and 𝜙, which had aroused a fair bit of interest among the mathematical brethren, π remains the sexiest (or overrated) number in the whole of mathematics.

π by MathPlus February 25, 2021

π 

A popular sexy numerical figure that is uninhibited to flirt around with other constants or numbers—in most instances, the relationship is purely platonic; however, with some real or imaginary partners, the liaisons look so intimate or passionate that they often evoke an aha! reaction from mathematical voyeurs.

A math book without π is like sex without orgasm.

π by MathPlus October 4, 2021

π 

An irrational number that is traditionally defined with respect to the circle, such as the following:
The length of a semicircle of radius one unit.
The angle measure of a straight line segment in radians.
The number of times the perimeter of a circle is more than its diameter.

To help students appreciate π beyond the canned definition that it is the ratio of circumference to diameter, teachers ought to define it in terms of other quantities not related to the circle.

π by MathPlus January 21, 2021

π 

Abbreviation for "pun intended". Just affix the sign to any sentence that includes a pun.

I would like to have peanuts. π

π by AdilShah October 25, 2022

π 

It's π, also known as pi or pie.

Me: I've got π memorized to 1000 places.
Guy: Oh really?
Me: 3.14159265... shit.

π by pastrybot January 18, 2009