First Known Use: 1844
Dictionary
billionaire
noun bil·lion·aire \ˌbi(l)-yə-ˈner, ˈbi(l)-yə-ˌ\
: a rich person who has at least a billion dollars, pounds, etc.
Full Definition of BILLIONAIRE
: one whose wealth is estimated at a billion or more (as of dollars or pounds)
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Origin of BILLIONAIRE
billion + -aire (as in millionaire)
Rhymes with BILLIONAIRE
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