octillion

[ ok-til-yuhn ]

/ ɒkˈtɪl yən /

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noun, plural oc·til·lions, (as after a numeral) oc·til·lion.

a cardinal number represented in the U.S. by 1 followed by 27 zeros, and in Great Britain by 1 followed by 48 zeros.

adjective

amounting to one octillion in number.

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Origin of octillion

1680–90; <French, equivalent to oct-oct- + -illion, as in million

OTHER WORDS FROM octillion

oc·til·lionth, noun, adjective

Words nearby octillion

Octavius, octavo, octavus, octennial, octet, octillion, octo-, October, October Revolution, Octobrist, octocentenary

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

British Dictionary definitions for octillion

octillion

/ (ɒkˈtɪljən) /

noun

(in Britain and Germany) the number represented as one followed by 48 zeros (10 48)

(in the US, Canada, and France) the number represented as one followed by 27 zeros (10 27)

Derived forms of octillion

octillionth, adjective

Word Origin for octillion

C17: from French, 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