Wraith (noun)

1. The ghost or apparition of a person, especially one who has recently died.
2. A visible spirit; an apparition.

Origin:

From scottish and northern english dialect wratch, from old english wræċċa "demon, monster, ghost".

Examples:

1. The villagers believed that the wraith haunted the old castle.
2. The wraith appeared before her, warning of danger to come.
3. The wraith was seen in the graveyard at midnight.
4. The wraith was said to be the ghost of a person who died unjustly.
5. The wraith was a sign of impending death, according to the legend.