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Cygnus atratus, an Australian swan whose feathers are black. / (figuratively) Something believed impossible or not to exist, of which an example is subsequently found.

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black swan

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black swan

noun

The black swan gracefully glided across the lake.

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意味（1）

Cygnus atratus, an Australian swan whose feathers are black.

意味（2）

(figuratively) Something believed impossible or not to exist, of which an example is subsequently found.

意味（3）

(figuratively, also attributive) A rare and hard-to-predict event with major consequences.

In the face of black swans — also known as fat-tail events, for the way their occurrences are distributed along a probability curve — market pricing may be impossible.

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black swan

Dictionary quizzes to help you remember vocabulary

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