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

The consortium is led by Macquarie Asset Management and includes UniSuper and Pontegadea, the investment firm of Spanish billionaire and Zara founder Amancio Ortega. —Lee Ying Shan, CNBC, 16 Feb. 2026

Luckey and Newsom do share antagonism toward labor unions’ proposal to levy a one-time 5% tax on billionaires. —Andrew Graham, Sacbee.com, 15 Feb. 2026

Partnering with billionaires Ken Griffin and Stephen Ross, Simas is shepherding a high-stakes campaign to rebrand the Sunshine State, on behalf of top leaders from more than 200 companies across the state. —Nick Lichtenberg, Fortune, 15 Feb. 2026

Building influence In March 2017, Epstein continued to play the role of networker for Barrack, suggesting separately that Bill Gates and the Indian billionaire Amil Ambani meet with Barrack. —Daniel Ruetenik, CBS News, 14 Feb. 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