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

This situation isn’t unique to Scott, and happens to other billionaire philanthropists. — Sydney Lake, Fortune, 16 July 2026

Four of the world’s five wealthiest people now have homes in billionaire-magnet Miami. — Linda Robertson, Miami Herald, 16 July 2026

Kirk Kerkorian, the fearsome billionaire owner of MGM, who ate there three to four times a week. — Elise Taylor, Vanity Fair, 16 July 2026

The auction house also has noted that Apex, purchased last year by hedge fund billionaire Ken Griffin, is now on long-term loan to the American Museum of Natural History in New York. — Daniel Cassady For Artnews, Robb Report, 15 July 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