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

An ally of SpaceX founder Elon Musk, the appointment of the billionaire, could signal a shift toward more private-sector leadership. —Brendan Cole, MSNBC Newsweek, 8 Nov. 2025

At 29, Kurchenko became a billionaire trading in gas, thanks to ties to an oligarch close to Russian President Vladimir Putin’s inner circle, Dmytro Firtash, according to Reuters. —Olena Loginova, Miami Herald, 7 Nov. 2025

The current billionaire would also need to remain Tesla CEO for seven and a half years to earn any shares from the new pay package, according to the pay agreement. —Charlotte Phillipp, PEOPLE, 7 Nov. 2025

Five members of a billionaire’s family. —Kaycee Sloan, Cincinnati Enquirer, 7 Nov. 2025

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