an Australian swan, Cygnus atratus, having mostly black plumage and a red bill.
an occurrence or phenomenon that comes as a surprise because it was not predicted or was hard to predict (often used attributively): a disastrous black-swan event that only appeared obvious in hindsight.
Black BeatlesRead more in this article about some frequently asked questions and fun facts related to our definitions.
black heartRead more in this article about some frequently asked questions and fun facts related to our definitions.
- black studies,
- black stump,
- black sucker,
- black swallowtail,
- black swallowwort,
- black tar heroin,
- black taxi,
- black tea,
- black tie,
- black titi
Origin of black swan
(def 2) from the belief that all swans were white, before the first sighting of Australian black swans
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a large Australian swan, Cygnus atratus, that has a black plumage and red bill
a phenomenon that occurs even though it had been thought to be impossible
Word Origin for black swan
sense 2 from the fact all swans were thought to be white until black swans were discovered in Australia
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