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

The tax, which would impose a one-time 5% tax on the net worth of billionaires in the state, has triggered an onslaught of spending and counterproposals by a group of Bay Area billionaires to stop it. —Grace Hase, Mercury News, 12 Apr. 2026

Meanwhile, the tech billionaires (who will profit handsomely from AI) are all lining up behind MAGA. —Matt K. Lewis, Twin Cities, 12 Apr. 2026

Swalwell is one of the Democratic frontrunners in the California gubernatorial primary, alongside fellow Democrats Katie Porter and billionaire Tom Steyer. —Madison E. Goldberg, PEOPLE, 11 Apr. 2026

The private orbital mission will bring billionaire Jared Isaacman to space for a second time after 2021′s Inspiration4 mission. —Richard Tribou, The Orlando Sentinel, 11 Apr. 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