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

Led by billionaire Koo Kwang-mo, the conglomerate last March revealed a 100 trillion won ($74 billion) five-year investment plan in South Korea’s future technologies, including AI, biotech and cleantech. —Zinnia Lee, Forbes.com, 15 July 2025

Private spaceflight is transforming from joy rides for billionaires into a gateway for nations to establish their space presence, one expert says, as the latest Axiom Space mission returned to Earth on Tuesday. —Doc Louallen, ABC News, 15 July 2025

And so billionaire philanthropy is an exercise of power and deserves skepticism rather than gratitude. —Alex Morris, Rolling Stone, 14 July 2025

Celebrities like Lizzo and billionaire Rihanna put Labubus on their own purses, further popularizing the toy. —Ashton Jackson valentina Duarte, CNBC, 14 July 2025

Word History

Etymology

billion + -aire (as in millionaire)

First Known Use

1844, 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