multimillionaire

American

[muhl-tee-mil-yuh-nair, muhl-tahy-] / ˌmʌl tiˌmɪl yəˈnɛər, ˌmʌl taɪ- /

noun

a person who possesses a fortune that amounts to many millions of dollars, euros, etc.

multimillionaire British

/ ˌmʌltɪˌmɪljəˈnɛə /

noun

a person with a fortune of several million pounds, dollars, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of multimillionaire

An Americanism dating back to 1855–60; multi- + millionaire

Compare meaning

How does multimillionaire compare to similar and commonly confused words? Explore the most common comparisons:

multimillionaire vs. millionaire

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Wealth managers are betting that high-touch lifestyle management will keep the multimillionaire set from jumping ship.

From The Wall Street Journal • Mar. 17, 2026

The 26-year-old, whose father Adam is a multimillionaire who made his fortune as a pensions trader, started racing karts at the age of eight, and was on pole position for his first national event.

From BBC • Dec. 7, 2025

The multimillionaire, who has contributed $100,000 to his newly formed campaign committee, confirmed that he planned on spending at least seven figures on his bid.

From Los Angeles Times • Dec. 5, 2025

Who would argue with a multimillionaire parent and/or tell them what’s really on your mind if you knew that you were in line to inherit a small fortune?

From MarketWatch • Oct. 29, 2025

In New York, the sisters arranged a magnetic healing session with multimillionaire financier and railroad magnate Cornelius Vanderbilt.

From "Votes for Women!" by Winifred Conkling

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023