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

Jackson’s foster-care-to-billionaire biography has been central to his campaign. —Shannon McCaffrey, AJC.com, 10 June 2026

Michele Kang, a billionaire entrepreneur, has made consistent bets on the growth of women’s sports—investments that should pay off given rising viewership, attendance, and valuations for teams and leagues. —Sean Gregory, Time, 9 June 2026

The loose ball bounced toward the 84-year-old billionaire during Game 3 between the New York Knicks and San Antonio Spurs. —Ryan Gaydos, FOXNews.com, 9 June 2026

The woman who has quietly stood by tech billionaire Elon Musk for 24 years finally gets her moment in the spotlight in this New York Times profile piece. —Melissa Hancock, Fortune, 9 June 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