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 voters decided on 14 measures on their ballot, ranging from the controversial — like the billionaire’s tax and tighter deadlines on environmental permitting — to the unchallenged — like the housing affordability bond. — Stephen Hobbs, Sacbee.com, 4 Nov. 2026

Under the initiative, a one-time five percent tax would’ve been imposed on the state’s 200-ish billionaires with net worths above $1 billion. — Winston Cho, HollywoodReporter, 4 Nov. 2026

Her opponent, billionaire biotech entrepreneur Vivek Ramaswamy, frequently sought to turn the race into a referendum on the lockdowns and school closures that occurred during Acton’s pandemic-era tenure in state government. — Sarah Todd, STAT, 4 Nov. 2026

The backlash may reach beyond one billionaire Many in the markets are stuck on the outdated idea that Democrats are less assertive than Republicans, said Aniket Shah, head of the Washington policy team at the investment bank Jefferies. — Matt Peterson, CNBC, 4 Nov. 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