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

Questions about the video will likely shadow Ramaswamy, a biotech billionaire who previously ran for president but has never before held public office, in the final two weeks of the contest. — Julie Carr Smyth, Los Angeles Times, 21 Oct. 2026

Combining the two would bring the tech and infrastructure parts of Musk’s empire together (the Wall Street pitch) and a hyperconcentrated bet on the billionaire’s inventions, politics, and personality (the actual pitch). — Prashant Rao, semafor.com, 21 Oct. 2026

For starters, the 46-year-old billionaire was confined to house arrest on his 300-acre Oxfordshire estate in England, fighting off a Swiss extradition request tied to an international money-laundering probe. — Cate Brown, ProPublica, 21 Oct. 2026

The researchers used Forbes billionaire rankings, real estate reports, and public relocation announcements. — Bilin Lin, Fortune, 21 Oct. 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