bil·​lion·​aire | \ˌbi(l)-yə-ˈner, ˈbi(l)-yə-ˌner\

Definition of billionaire 

: 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

Aside from being a 21-year-old billionaire and a number-one Billboard charts rapper, Kylie Jenner and boyfriend Travis Scott are also still getting to grips with the art of first-time parenting. Lucy Wood, Marie Claire, "Kylie Jenner and Travis Scott's New Photos of Daughter Stormi Are the Cutest Yet," 23 Aug. 2018 Bartenders at the event wore shirts featuring Kylie's cover of Forbes magazine, when it was revealed that the makeup mogul is set to be America's youngest billionaire. Amy Mackelden, Harper's BAZAAR, "Kylie Jenner Wears the Tiniest Sparkly Gucci Dress in Vegas for Her 21st Birthday," 12 Aug. 2018 Rooney married billionaire William Koch, brother to David and Charles Koch, in 2005. Megan Stein, Country Living, "A Detailed Timeline of Kevin Costner's Huge Family," 18 July 2018 The Russian billionaire and founder was also a major investor in Facebook. Issie Lapowsky, WIRED, "Facebook Gave a Russian Internet Giant a Special Data Extension," 10 July 2018 This Is Us’ The top 5 of the world’s richest billionaires are rounded out by some other usual suspects, including, Warren Buffett at number 3, Bernard Arnault at number 4 and Mark Zuckerberg at 5. Lindsay Kimble,, "Jeff Bezos Is the Richest Man in the World with a Net Worth of $141 Billion (Sorry, Bill Gates!)," 19 June 2018 The Kochs aren’t just right-wing billionaires, but men who think about politics in big, broad, and far-reaching ways. Jeet Heer, The New Republic, "The Koch brothers know how to play the long game to change America.," 19 June 2018 Alderman Scott Waguespack, a member of the City Council's progressive caucus, said Emanuel was again putting the interests of billionaires and big corporations ahead of the needs of neighborhoods and taxpayers. Sara Burnett, The Christian Science Monitor, "Elon Musk to build high-speed transportation system in Chicago," 15 June 2018 In its legal filings, Exxon maintains that the Rockefellers and the hedge fund billionaire Tom Steyer, who is funding a campaign to impeach President Donald Trump, are behind the wave of litigation. James Osborne, San Antonio Express-News, "Inside Exxon Mobil’s fight to stop climate change litigation in its tracks," 15 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'billionaire.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of billionaire

1844, in the meaning defined above

History and Etymology for billionaire

billion + -aire (as in millionaire)

Keep scrolling for more

Learn More about billionaire

Share billionaire

Statistics for billionaire

Last Updated

12 Nov 2018

Look-up Popularity

Time Traveler for billionaire

The first known use of billionaire was in 1844

See more words from the same year

Keep scrolling for more

More Definitions for billionaire



English Language Learners Definition of billionaire

: a rich person who has at least a billion dollars, pounds, etc.

Keep scrolling for more

Comments on billionaire

What made you want to look up billionaire? Please tell us where you read or heard it (including the quote, if possible).


full of whispering sounds

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!