rockefeller
n. countablen. a person who is extremely rich. It comes from the name of a famous American family known for their great wealth and business power.
n. an individual of immense wealth and influence, typically used as a metonym for the American industrialist John D. Rockefeller. Often used figuratively to describe anyone with vast financial resources.
He spends money like he is a Rockefeller.
Even though the family lived modestly, the neighbors joked that the father must be a secret Rockefeller.
From the German place name Rockenfeld.
From John D. Rockefeller, the American industrialist who founded Standard Oil, also recognized for his 20th century philanthropy.
When used as a common noun to mean 'a rich person', it is typically capitalized and takes an indefinite article.