Onassis

American

[oh-nas-is, oh-nah-sis] / oʊˈnæs ɪs, oʊˈnɑ sɪs /

noun

Aristotle Socrates, 1906–75, Greek businessman, born in Turkey.
Jacqueline (Lee Bouvier Kennedy) Jackie, 1929–94, wife of John F. Kennedy (1953–63) and Aristotle Onassis (1968–75).

Onassis British

/ əʊˈnæsɪs /

noun

Aristotle ( Socrates ). 1906–75, Argentinian (formerly Greek) shipowner, born in Turkey. In 1968 he married Jacqueline, 1929–94, the widow of US President John F. Kennedy

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In the 20th century, legendary shipping rivals Aristotle Onassis and Stavros Niarchos cashed in when the Suez crisis sent tanker rates soaring.

From The Wall Street Journal • Mar. 6, 2026

However, the “Love Story” forebear that matters most in this discussion is not John F. Kennedy or Jacqueline Kennedy Onassis, played here by “Feud” star Naomi Watts.

From Salon • Feb. 12, 2026

He transformed her wardrobe, and in 1968 she picked an ivory-coloured lace dress from his famous white collection for her second marriage to Greek shipping mogul Aristotle Onassis.

From Barron's • Jan. 19, 2026

As first reported by the New York Post, Schumer’s new apartment overlooks Central Park and the Jackie Kennedy Onassis Reservoir—and offers three bedrooms and 3.5 bathrooms.

From MarketWatch • Jan. 15, 2026

Then they’d needle her about spending nine years with Aristotle Onassis only to get dumped for the future Jackie O. They needed to prick the goddess to see if she bled.

From Los Angeles Times • Nov. 27, 2024

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023