3.14159265358979323846264338327950288419716930 582097494459230781640628620899862803482534219 821480865132823066470938446095505822317253598 481117450284102701938521105559644622948954936 442881097566593344612847564823378678316527121 456485669234603486104543266482133936072602493 724587006606315588174881520920962829254091716
Dictionary Definitions from Oxford Languages · Learn more pi1 /pʌɪ/ noun the sixteenth letter of the Greek alphabet ( Π, π ), transliterated as ‘p’. symbol 1. the numerical value of pi.