Definition of billionaire in English:

billionaire

Syllabification: bil·lion·aire
Pronunciation: /ˈbilyəˌne(ə)r
 
/

noun

A person possessing assets worth at least a billion dollars (or pounds, etc.).
More example sentences
  • Melbourne is filling with tycoons, moguls, magnates, billionaires and mere millionaires.
  • And there are multi-millionaires and billionaires earning hundreds of millions of dollars per year.
  • Last year there were 497 billionaires with a net worth of 1.54 trillion dollars.

Origin

mid 19th century: from billion, on the pattern of millionaire.

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