billionaire

noun

bil·​lion·​aire ˌbi(l)-yə-ˈner 

ˈbi(l)-yə-ˌner

: one whose wealth is estimated at a billion or more dollars, pounds, or other monetary units

Examples of billionaire in a Sentence

Recent Examples on the Web

The Athletic’s Matthew Futterman wrote a fascinating story on Ackman, who’s become a very public billionaire in both politics and now tennis. — Chris Branch, New York Times, 11 Sep. 2026

The billionaire chairman and CEO of WorldQuant has been a pioneer in applying AI and other technologies to vast collections of data, looking to build predictive models from historical information. — Andrew Edgecliffe-Johnson, semafor.com, 11 Sep. 2026

In July, a bipartisan panel found tech billionaire Elon Musk likely broke state law by giving $1 million checks to voters in the 2025 Wisconsin Supreme Court election. — Chloe Taylor, CNBC, 10 Sep. 2026

Ballmer is called out to an extent that one almost never sees when applied to the millionaires and billionaires who own most professional sports teams. — Business Columnist, Los Angeles Times, 10 Sep. 2026

Word History

Etymology

billion + -aire (as in millionaire)

First Known Use

1841, in the meaning defined above

Rhymes for billionaire

• aftercare
• anywhere
• chinaware
• debonair
• dinnerware
• disrepair
• doctrinaire
• earthenware
• everywhere
• frigidaire
• kitchenware
• legionnaire

Kids Definition

billionaire

noun

bil·​lion·​aire ˌbil-yə-ˈna(ə)r 

-ˈne(ə)r;

ˈbil-yə-ˌna(ə)r, 

-ˌne(ə)r

: one whose wealth is a billion dollars or more