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

But the billionaire has pushed back against guardrails for Grok within the firm, one source with knowledge of the situation at xAI told CNN. —Lex Harvey, CNN Money, 12 Jan. 2026

The list includes Karen LeFrak, the composer wife of real estate king Richard LeFrak; skin care mogul Peter Thomas Roth; Chagit Leviev Sofiev of Leviev Diamonds; and philanthropist Kimberly Paige Bluhm, wife of billionaire casino magnate Neil Bluhm. —Richard Johnson, New York Daily News, 11 Jan. 2026

The building complex, known as Hudson’s Detroit, is owned by a real estate company of Rocket Companies chairman and billionaire Dan Gilbert, who has been purchasing and renovating properties in Detroit for more than a decade. —Michael Wayland, CNBC, 11 Jan. 2026

All of them are begging the millionaires and billionaires who have helped build a facility or throw some nice cars at recruits of the past to sustain competitive payrolls. —Joe Rexrode, New York Times, 11 Jan. 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