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

While some large checks have been cut by big names like New York City billionaire Michael Bloomberg and figures well known in the local or national business worlds, others have come from deep pockets that are harder to identify. —Nick Coltrain, Denver Post, 1 Feb. 2026

In its sophomore season, Cross is in pursuit of a ruthless vigilante who is hunting down corrupt billionaire magnates. —Jessica Radloff, Glamour, 1 Feb. 2026

The latest Justice Department release of 3 million pages and thousands of images exposed more details of Epstein’s connections to presidents, billionaires and celebrities. —Michael R. Sisak, Los Angeles Times, 1 Feb. 2026

Steyer, a billionaire himself, has said the state’s wealthiest residents and cooperations should pay more in taxes. —Grace Hase, Mercury News, 1 Feb. 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