zillionairehttp://www.oed.com/dictionary/zillionaire_n%3Ftab%3Dmeaning_and_usezillionaire, n.
Revised 2021

zillionairenoun

colloquial (originally U.S.).
  1. 1926–
    A person of enormous wealth.
    1. 1926
      A fortune left by his uncle, ‘a zillionaire’.
      Oakland (California) Tribune 13 December 26/3
    2. 1959
      He's a zillionaire himself... He's crawling with money.
      I. Fleming, Goldfinger iv. 50
    3. 1969
      A sprinkling of..Texas zillionaires, film stars, socialites and international playboys.
      Daily Telegraph 15 August (Colour Supplement) 21/3
    4. 1999
      Silicon Valley zillionaires make in 15 minutes on the stock market what they pay their housekeepers in a year.
      Time 11 October 34/1

Originally published as part of the entry for zillion, n. & adj.

zillionaire, n. was revised in March 2021.

zillionaire, n. was last modified in July 2023.