trillion

noun

tril·​lion ˈtri(l)-yən How to pronounce trillion (audio)
1
: a number equal to 1,000 times one billion see Table of Numbers
2
: an indeterminately large number
a trillion mosquitoes out tonight
trillion adjective
trillionth adjective or noun

Examples of trillion in a Sentence

Recent Examples on the Web
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.
Yet even as stocks climb, trillions of dollars are being parked in money-market funds—a sign of investor unease. Dana Taylor, USA Today, 28 Oct. 2025 In the same spirit, the president has imposed an expansive tariff regime, affecting trillions of dollars in trade, in hopes of reshaping the economy according to his priorities. Bloomberg Opinion, Twin Cities, 28 Oct. 2025 Not just millions of dollars, but billions or trillions such as in the stock market. Emma Burleigh, Fortune, 21 Oct. 2025 Your gut microbiome is the community of trillions of microorganisms (such as fungi, bacteria, and viruses) that live in your gut. Cynthia Sass, Health, 21 Oct. 2025 See All Example Sentences for trillion

Word History

Etymology

French, from tri- + -illion (as in million)

First Known Use

1690, in the meaning defined at sense 1

Time Traveler
The first known use of trillion was in 1690

Browse Nearby Words

Cite this Entry

“Trillion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trillion. Accessed 3 Nov. 2025.

Kids Definition

trillion

noun
tril·​lion ˈtril-yən How to pronounce trillion (audio)
1
: a number equal to 1,000 times one billion see number
2
: a very large number
a trillion mosquitoes out tonight
trillion adjective
trillionth adjective
trillionth noun

More from Merriam-Webster on trillion

Last Updated: - Updated example sentences
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