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

For billionaires and business moguls, summertime means interrupting trips to Portofino by gassing up the corporate jet and heading to Idaho for Allen & Co.’s annual leadership retreat in Sun Valley. —Matt Donnelly, Variety, 10 June 2025

The contentious professional relationship between billionaire Elon Musk and President Donald Trump has seemingly come to an end. —Maria Gracia Santillana Linares, Forbes.com, 10 June 2025

The Trump taco salad tweet allowed his campaign to present their billionaire boss to Latinos as just any other Jose Schmo ready to chow down on Mexican food. —Gustavo Arellano, Los Angeles Times, 9 June 2025

Trump's billionaire adviser Elon Musk complicated the debate by urging lawmakers to kill the bill. —Bart Jansen, USA Today, 8 June 2025

Word History

Etymology

billion + -aire (as in millionaire)

First Known Use

1844, 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