Black Swan

Definition(s):

A term popular in Business Continuity Management (BCM), based upon a book of the same name in which the author defines a black swan as an event that could not be predicted by normal scientific or probability methods. BCM professionals need to prepare for “black swan” events.

Source: BCI/DRJ

A black swan is a metaphor used to describe an event or occurrence that is deemed highly improbable yet has massive consequences. It is used to describe events that deviate drastically from the expected norm.