What is banshee definition?

A banshee is a female spirit in Irish mythology who is said to be the harbinger of death. She is often depicted as a woman with long hair and dressed in a white or grey cloak. The banshee is said to wail or scream when someone is about to die or has died, and her cry is regarded as an omen of death. In Irish folklore, banshees are often associated with specific families and are believed to follow them through generations. The name banshee is derived from the Gaelic term bean-sídhe, which means "woman of the fairy mound."