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

Both companies are known to have high-profile clients, including billionaires and celebrities. — Doug Gollan, Forbes.com, 7 Aug. 2026

The group's donors include tech billionaire Chris Larsen and several renewable energy companies. — Joe Walsh, CBS News, 7 Aug. 2026

An unlikely working relationship develops between an overzealous tech billionaire and a reluctant writer who realizes the only way to make artificial intelligence any better is to fix the broken real world it’s trained on. — Matt Grobar, Deadline, 6 Aug. 2026

Miami billionaire hedge fund manager and philanthropist Ken Griffin announced a $5 million gift Thursday to launch the National Math Talent Fund, an effort to help financially stressed math students across the country get their degrees. — Austin Horn, Miami Herald, 6 Aug. 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