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

Of these, a dozen are from India, forming the biggest cohort of immigrant billionaires in America. —Naazneen Karmali, Forbes.com, 8 Aug. 2025

These themes arguably resonate in today’s world of tech billionaires, growing income inequality and A.I. replacing human workers. —Martha Ross, Mercury News, 7 Aug. 2025

On July 17, the Wall Street Journal first revealed a birthday letter book compiled by Ghislaine Maxwell for Epstein containing messages from Donald Trump, former President Bill Clinton, fashion designer Vera Wang and billionaire Leon Black, among others. —Etan Vlessing, HollywoodReporter, 6 Aug. 2025

However, supporters such as Pritzker, a billionaire, and U.S. Rep. Jasmine Crockett, a star Democratic fundraiser from Texas, have offered to help the fleeing Democrats. —Aysha Bagchi, USA Today, 5 Aug. 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