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

There’s a lot of chatter about getting the billionaire David Rubenstein, a Baltimore native known for his patriotic bent, to contribute. —Andrea Riquier, USA Today, 13 Dec. 2025

Meanwhile, billionaire Mark Cuban would even resort to installing Cisco routers and using management software to monitor which apps his children were on and shut off their phone activity. —Sawdah Bhaimiya, CNBC, 13 Dec. 2025

That’s made billionaires of founders Toby Neugebauer and Griffin Perry, son of former US energy secretary Rick Perry. —Neil Callanan, Fortune, 12 Dec. 2025

The superstar makes the Forbes billionaire list for a third year in a row. —Bryan West, Nashville Tennessean, 12 Dec. 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