Black swan

Noun

Definitions

1.NounCygnus atratus, a swan with black plumage and a red bill which is endemic to Australia. .mw-parser-output .defdate{font-size:smaller}

2.NounSomething believed impossible or not to exist, especially if an example is subsequently found; also, something extremely rare; a rara avis.

":"

3.NounSomething believed impossible or not to exist, especially if an example is subsequently found; also, something extremely rare; a rara avis.

":"

4.NounA rare and hard-to-predict event with major consequences.

The Daily Word NerdA new word, a puzzle, and a fun fact — free in your inbox every morning.

Free forever · unsubscribe anytime · all 14 newsletters

That email did not go through — please check it and try again.