• synonyms


[bil-yuh-nair, bil-yuh-nair]
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  1. 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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

  • The Billionaire, however, wasted but scant time in consideration.

    The Air Trust

    George Allan England

British Dictionary definitions for billionaire


  1. 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

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