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

His life couldn’t be more different today, especially as a private doctor for billionaires who reward him with designer bags full of cash. —Lizz Schumer, PEOPLE, 4 Jan. 2026

The private orbital mission will bring billionaire Jared Isaacman to space for a second time after 2021′s Inspiration4 mission. —Richard Tribou, The Orlando Sentinel, 4 Jan. 2026

Then there is the steady stream of profiles on tech billionaires joylessly devoting themselves to maximizing their lifespan. —CBS News, 3 Jan. 2026

Mehta is the president of Sim Gems USA, a diamond dealer that sources investment-worthy stones for discerning billionaires; his customers include Nita Ambani, the wife of the richest man in Asia. —Emilia Petrarca, New Yorker, 2 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