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

But that promise was undercut after it was reported that Article One PAC, a group tied to a billionaire AIPAC donor, is dropping $600,000 on media supporting Foushee. —Rachel Schilke, The Washington Examiner, 2 Mar. 2026

Connecticut’s annual budget has been balanced partly by a relative handful of millionaires and billionaires who disproportionately fill the state coffers. —Christopher Keating, Hartford Courant, 1 Mar. 2026

So far, the trend to hug a billionaire has yet to emerge. —Michael Smolens, San Diego Union-Tribune, 1 Mar. 2026

The measure was pushed by the Freedom Foundation, a right-wing think tank funded by billionaires. —Jim Defede, CBS News, 1 Mar. 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