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

With higher prices and a looming billionaire wealth tax, the Golden State continues to see both working-class residents and wealthy business owners leaving for more affordable cities. —Lindsay Kornick, FOXNews.com, 2 June 2026

The crowd is all deep-pockets and haute couture, including fashion, tech, and media elites, press-shy billionaires, and ladies of leisure. —Condé Nast, Condé Nast Traveler, 2 June 2026

When the Fontainebleau faced local opposition and red tape earlier this year in its quest to build water slides on its pool deck, the hotel’s billionaire owner, Jeffrey Soffer, successfully lobbied for a change to state law. —Aaron Leibowitz, Miami Herald, 2 June 2026

Most recently, polls show the contest could be between two Democrats — the Health and Human Services secretary under former President Joe Biden, Xavier Becerra, and billionaire philanthropist Tom Steyer. —Saige Miller, NPR, 2 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