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

Casar’s story touched on a subject close to Sanders’s heart, and not only because the senator dislikes it when billionaires get sweetheart deals. —Louisa Thomas, New Yorker, 29 Mar. 2026

Among the transactions Doe flagged were payments to Epstein by Apollo Global Management's billionaire co-founder, Leon Black. —Luc Cohen, USA Today, 28 Mar. 2026

Pope Leo on Saturday made a day trip to Monaco, a tax-free microstate on the French ⁠Riviera known as a haven for billionaires and their luxury yachts, and urged its residents to share their wealth and help those in need. —Reuters, NBC news, 28 Mar. 2026

In 2022, billionaire developer Rick Caruso threw more than $100 million of his own money into his campaign against Bass during the primary and runoff elections. —Los Angeles Times, 28 Mar. 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