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billionaire - 2 dictionary results

bil⋅lion⋅aire

[bil-yuh-nair, bil-yuh-nair]
–noun
a person who has assets worth a billion or more dollars, francs, pounds, or the like.

Origin:
1855–60, Americanism; billion + -aire, on the model of millionaire
bil·lion·aire   (bĭl'yə-nâr', bĭl'yə-nâr')   
n.  A person whose wealth amounts to at least a billion dollars, pounds, or the equivalent in other currency.

[billion + (million)aire.]
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