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

Stephen Feinberg, the private-equity billionaire turned DoD deputy, is planning $200 billion in deals with Wall Street partners. — Liz Hoffman, semafor.com, 20 Aug. 2026

The rally turned Micron CEO Sanjay Mehrotra, a nine-year veteran of the company, into a billionaire earlier this year, though last month's selloff pushed him below that mark. — Cj Haddad,katie Tarasov, CNBC, 20 Aug. 2026

The deal is a transfer of assets controlled by media billionaire John Malone, whose many corporate affiliations include serving as chairman of Liberty Broadband. — Dade Hayes, Deadline, 20 Aug. 2026

Now, Moderna cofounder Robert Langer has re-entered the billionaires club following promising cancer vaccine trials that sent the company’s stock soaring. — Emma Burleigh, Fortune, 20 Aug. 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