millionaire

noun

mil·​lion·​aire ˌmi(l)-yə-ˈner How to pronounce millionaire (audio)
ˈmi(l)-yə-ˌner
Synonyms of millionairenext
: a person whose wealth is estimated at a million or more (as of dollars or pounds)

Examples of millionaire in a Sentence

Recent Examples on the Web
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France became a cautionary tale, with critics often pointing to estimates that tens of thousands of millionaires left while its wealth tax was in place. — Greg Rosalsky, NPR, 2 Nov. 2026 There aren’t enough millionaires or billionaires to pay for everything else. — Voice Of The People, New York Daily News, 30 Oct. 2026 In 1893, the San Francisco Examiner approached four California super millionaires — today’s billionaires — for advice on prospering in the state. — Patt Morrison, Los Angeles Times, 30 Oct. 2026 In the wake of a potential wealth tax in California and a new millionaires’ tax in Washington, Florida is a safe haven for billionaires trying to protect their fortunes (although not all will admit that’s the motive behind their move). — Sydney Lake, Fortune, 29 Oct. 2026 See All Example Sentences for millionaire

Word History

Etymology

French millionnaire, from million, from Middle French milion

First Known Use

1786, in the meaning defined above

Time Traveler
The first known use of millionaire was in 1786

Browse Nearby Words

Cite this Entry

“Millionaire.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/millionaire. Accessed 7 Nov. 2026.

Kids Definition

millionaire

noun
mil·​lion·​aire ˌmil-yə-ˈna(ə)r How to pronounce millionaire (audio)
-ˈne(ə)r, 
ˈmil-yə-ˌna(ə)r, 
-ˌne(ə)r
: one whose wealth is estimated at a million or more (as of dollars)

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