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

In June, SpaceX’s record-breaking IPO made Elon Musk the world’s first trillionaire. — Katica Roy, Fortune, 15 Sep. 2026

Musk became the world’s first trillionaire after his company SpaceX went public in June. — Jack Smart, PEOPLE, 7 Sep. 2026

Shares jumped as high as $225 a share, briefly making Musk a trillionaire. — Stephen Smith, Los Angeles Times, 26 Aug. 2026

This brings us to the heart of the episode, set hundreds of years in the past, where the trillionaire Per Stensen is explaining his silo plan to Daniel and Helen. — Noel Murray, Vulture, 21 Aug. 2026

Word History

Etymology

trillion + -aire (in millionaire)

First Known Use

1861, in the meaning defined above