trillion

noun

tril·​lion ˈtri(l)-yən How to pronounce trillion (audio)
Synonyms of trillionnext
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.
The federal government is trillions of dollars in debt. Kathy Szeliga, Baltimore Sun, 8 June 2026 The next 12 months are likely to see three of the biggest IPOs in history (SpaceX, Anthropic, and OpenAI), raising more than $100bn dollars and creating valuations well into the trillions. Kamal Ahmed, Fortune, 8 June 2026 For many, the sell-off reads as a warning sign for speculative excess in the face of trillions of dollars in upcoming IPO issuance and the potential for rising interest rates. Oliver Renick, CNBC, 6 June 2026 But amid the billions — even trillions — at stake, worries about an AI bubble are looming in the background. ABC News, 3 June 2026 See All Example Sentences for trillion

Word History

Etymology

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

First Known Use

1745, in the meaning defined at sense 2

Time Traveler
The first known use of trillion was in 1745

Browse Nearby Words

Cite this Entry

“Trillion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trillion. Accessed 12 Jun. 2026.

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

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