supermillionaire

noun

su·​per·​mil·​lion·​aire ˌsü-pər-ˌmi(l)-yə-ˈner 

-ˈmi(l)-yə-ˌner

plural supermillionaires

: one whose wealth amounts to many millions (as of dollars or pounds)

… the tax rate on the top 400 households in America—those with an average annual income of nearly $350 million—fell by more than a third. In fact, the tax rate for these supermillionaires is now less than the tax rate for average Americans.

—Charles M. Blow

Word History

First Known Use

1913, in the meaning defined above