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[bil-yuh-nair, bil-yuh-nair] /ˌbɪl yəˈnɛər, ˈbɪl yəˌnɛər/
a person who has assets worth a billion or more dollars, francs, pounds, or the like.
Origin of billionaire
1855-60, Americanism; billion + -aire, on the model of millionaire Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for billionaire
Contemporary Examples
Historical Examples
  • That means that in five years I will be a billionaire, and only forty-two.

    The Root of Evil

    Thomas Dixon
  • Who but a billionaire could say what was fair exchange for a billion?

    The Golden Bowl Henry James
  • "Don't try to," the billionaire replied, with seeming benevolence.

    The Air Trust George Allan England
  • For a moment the billionaire regarded him with a look of intense irritation.

    The Air Trust George Allan England
  • For eighteen years the chemist had lickspittled to the billionaire.

    The Air Trust George Allan England
British Dictionary definitions for billionaire


a person whose assets are worth over a billion of the monetary units of his country
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
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Word Origin and History for billionaire

1844, American English, from billion on model of millionaire. The first in the U.S. likely was John D. Rockefeller (1839-1937), some time after World War I.

Online Etymology Dictionary, © 2010 Douglas Harper
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