quintillion
noun
quin·til·lion
kwin-ˈtil-yən 
US
: a number equal to 1 followed by 18 zeros see Table of Numbers
quintillion
adjective
Examples of quintillion in a Sentence
Recent Examples on the Web
One prominent example is Hewlett Packard Enterprise’s (HPE) Frontier supercomputer, which can perform a quintillion (1,000,000,000,000,000,000) calculations per second – over a million times more than the number of stars in the Milky Way galaxy.
—
Cat Wang, Forbes.com, 19 May 2025
The odds of getting a perfect March Madness bracket are astronomically low, estimated at around 1 in 9.2 quintillion.
—Jay Ginsbach, Forbes, 3 Mar. 2025
Complete randomness would be a 9.2 quintillion chance of picking the perfect NCAA bracket.
—Ars Technica, 20 Mar. 2025
If that number was rounded off to nine quintillion, that’s nine followed by 18 zeroes.
—Blair Kerkhoff, Kansas City Star, 16 Mar. 2025
See All Example Sentences for quintillion
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Cat Wang, Forbes.com, 19 May 2025
The odds of getting a perfect March Madness bracket are astronomically low, estimated at around 1 in 9.2 quintillion.
—Jay Ginsbach, Forbes, 3 Mar. 2025
Complete randomness would be a 9.2 quintillion chance of picking the perfect NCAA bracket.
—Ars Technica, 20 Mar. 2025
If that number was rounded off to nine quintillion, that’s nine followed by 18 zeroes.
—Blair Kerkhoff, Kansas City Star, 16 Mar. 2025
See All Example Sentences for quintillion
Cite this Entry
“Quintillion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quintillion. Accessed 25 May. 2025.
Copy CitationKids Definition
quintillion
noun
quin·til·lion
kwin-ˈtil-yən
Love words? Need even more definitions?
Merriam-Webster unabridged
Share