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Definition of billionaire

billionaire

/ˌbɪljəˈnɛr/
bil · lion · aire
Plural:billionaires
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billionaire Lexical Profile

billionaire Game Scores & Validity

• noun

1

A person whose material wealth, assets, or net worth equals at least one billion units of a given currency (such as dollars, pounds, or euros).

Example

"The tech billionaire pledged to donate a substantial portion of his fortune to global health initiatives."

Synonyms
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Antonyms
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• Rhymes for billionaire

• Nearby Words

billing
billings
billion
billionaire
billionth
billow
billowy

Word Origin & Etymology

Coined in mid-19th-century American English from 'billion' plus the suffix '-aire', modeled directly on the French loanword 'millionaire'.

Cite this Entry

Wordmom. (2026). Definition of Billionaire. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/billionaire
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