trillionaire

noun

tril·​lion·​aire ˌtri(l)-yə-ˈner How to pronounce trillionaire (audio)
ˈtri(l)-yə-ˌner
plural trillionaires
: a person whose wealth is estimated at a trillion or more dollars, pounds, or other monetary units
Many of us feel our e-mail inboxes are overflowing with spam, bad jokes and ridiculous offers about how to become trillionaires.Suzanne Choney
On the surface, Mr. Son—who is one of Japan's richest men but is often described as modest—and Mr. Neumann, who has said he wants to become the world's first trillionaire and "president of the world," couldn't have been more different.Amy Chozick

Word History

Etymology

trillion + -aire (in millionaire)

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of trillionaire was in 1861

Browse Nearby Words

Cite this Entry

“Trillionaire.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trillionaire. Accessed 28 Aug. 2026.

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