quadrillion

[ kwo-dril-yuhn ]

/ kwɒˈdrɪl yən /

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noun, plural quad·ril·lions, (as after a numeral) quad·ril·lion.

a cardinal number represented in the U.S. by 1 followed by 15 zeros, and in Great Britain by 1 followed by 24 zeros.

adjective

amounting to one quadrillion in number.

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Origin of quadrillion

1665–75; quadr- + -illion (as in million)

OTHER WORDS FROM quadrillion

quad·ril·lionth, noun, adjective

Words nearby quadrillion

quad right, quadrilateral, quadrilingual, quadriliteral, quadrille, quadrillion, quadrinomial, quadripartite, quadriphonics, quadriplegia, quadriplegic

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use quadrillion in a sentence

The observatory on Pluto had reported a free planet passing within two hundred quadrillion miles of the solar system.
Unthinkable|Roger Phillips Graham
"Three quadrillion times, my son," replied his father with perfect accuracy and a spirit of hourly freshness.
The Kentucky Warbler|James Lane Allen
Quadrillion, kwod-ril′yun, n. a million raised to the fourth power, represented by a unit with twenty-four ciphers.
Chambers's Twentieth Century Dictionary (part 3 of 4: N-R)|Various
They give off resonance waves, each one absolutely unique; there's about one chance in a quadrillion of a duplicate pattern.
Starman's Quest|Robert Silverberg

Their velocity was six hundred and sixty quadrillion miles per second!
Invaders from the Infinite|John Wood Campbell

British Dictionary definitions for quadrillion

quadrillion

/ (kwɒˈdrɪljən) /

noun

(in Britain) the number represented as one followed by 24 zeros (10 24)US and Canadian word: septillion

(in the US and Canada) the number represented as one followed by 15 zeros (10 15)

determiner

amounting to this numbera quadrillion atoms
(as pronoun)a quadrillion

Derived forms of quadrillion

quadrillionth, adjective

Word Origin for quadrillion

C17: from French quadrillon, from quadri- + -illion, on the model of million

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