multibillionaire
noun
mul·ti·bil·lion·aire
ˌməl-tē-ˌbi(l)-yə-ˈner
-ˌtī-,
-ˈbi(l)-yə-ˌner
plural multibillionaires
: a person whose wealth is estimated at many billions (as of dollars or pounds)
an entrepreneur who became a multibillionaire
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Merriam-Webster unabridged
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