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

California billionaires saw their net worth rise roughly 25%, or $432 billion, in less than two years, according to a new analysis by progressive groups backing the Proposition 40 billionaire wealth tax. — Ben Paviour, Sacbee.com, 23 Sep. 2026

As a result, a billionaire media conglomerate closely allied with the president will soon own one of its closest rivals, including some of the nation’s most critical news outlets. — Alejandra Gularte, Vulture, 22 Sep. 2026

VinFast is backed by Vingroup, one of Vietnam's largest private conglomerates, founded by Vietnamese billionaire Pham Nhat Vuong, which has built an ecosystem around its EVs spanning charging and after-sales services. — Jenny Lee, CNBC, 22 Sep. 2026

Deputy Commissioner Bill Daly spoke to billionaire Dan Friedkin's group last week and got a full report, and representatives from the 32 current teams were briefed on the situation with no timetable to consider a possible vote on adding a 33rd. — ABC News, 22 Sep. 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