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

Trump, Elon Musk claim fraud within SSA President Donald Trump and his senior advisor, billionaire Elon Musk, have both raised concerns about potential fraud within the SSA. —Jonathan Limehouse, USA TODAY, 19 Mar. 2025

The terminations at the tax agency were among the deep cuts to federal agencies by the Trump administration and its Department of Government Efficiency, led by the billionaire Trump adviser Elon Musk. —Andy Kroll, ProPublica, 19 Mar. 2025

The job reductions are part of a broader initiative led by the Department of Government Efficiency Service, which includes billionaire Elon Musk, aimed at downsizing federal agencies. —Hannah Parry, Newsweek, 19 Mar. 2025

The president’s latest social media post aligns him more with allies like billionaire Elon Musk, who has made similar demands. —Chris Megerian, Chicago Tribune, 18 Mar. 2025

Word History

Etymology

billion + -aire (as in millionaire)

First Known Use

1844, 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