trillionaire

noun

tril·​lion·​aire ˌtri(l)-yə-ˈner 

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

Examples of trillionaire in a Sentence

Recent Examples on the Web

That raised the question of whether the world’s first trillionaire would participate. — Sydney Lake, Fortune, 9 Oct. 2026

With Monday's 8% rally to $171, shares of the rocket maker have jumped nearly 50% off its lows, reclaimed its IPO price and made CEO Elon Musk a trillionaire again. — Oliver Renick, CNBC, 6 Oct. 2026

Well, that first trillionaire, Elon Musk, became a trillionaire because of government largesse, because of government contracts that saved his bacon when his companies were in trouble. — Nilay Patel, The Verge, 5 Oct. 2026

He’s called out Texas resident Elon Musk—not for pledging millions to keep Talarico from representing him in Washington, but for becoming the world’s first trillionaire. — Philip Elliott, Time, 30 Sep. 2026

Word History

Etymology

trillion + -aire (in millionaire)

First Known Use

1861, in the meaning defined above