septillion
Americannoun
adjective
noun
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(in Britain, France, and Germany) the number represented as one followed by 42 zeros (10 42 )
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Brit word: quadrillion. (in the US and Canada) the number represented as one followed by 24 zeros (10 24 )
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of septillion
1680–90; < French, equivalent to sept seven + -illion, as in million
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Google has unveiled a new chip which it claims takes five minutes to solve a problem that would currently take the world's fastest super computers a septillion – or 10,000,000,000,000,000,000,000,000 years – to complete.
From BBC ● Dec. 9, 2024
Our brains are made of more than a septillion molecules, each formed by connected atoms, akin to Lego blocks clicked together.
From Washington Post ● Mar. 5, 2022
By some accounts, there are a septillion stars in the visible universe.
From The New Yorker ● Jan. 18, 2016
No, that term for 1 septillion bytes has nothing to do with the mythical Yeti.
From Forbes ● Jun. 28, 2013
Today they perform hundreds of septillions of matrix multiplications to power leading large language models.
From MarketWatch ● May 23, 2026
Why, just with an alphabet of twenty-four letters, Leibnitz the great mathematician, calculated that over six hundred septillions of easily pronounceable words, none over three syllables long, could be arranged.
From The Boy With the U.S. Census by Rolt-Wheeler, Francis
After an elaborate computation of hereditary possibilities, biologists announce that the chance of any two human creatures being exactly alike is one in five septillions.
From The New Education A Review of Progressive Educational Movements of the Day (1915) by Nearing, Scott
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
