A ghost is said to be the apparition of a dead person. They are usually seen to be similar in appearance to that person, and are often encountered in places he or she frequented, or in association with the person's former belongings. The word "ghost" may also refer to the spirit or soul of a deceased person, or any spirit or demon. Ghosts are often associated with haunting's, which is, according to the Parapsychological Association, "the more or less regular occurrence of paranormal phenomena associated with a particular locality (especially a building) and usually attributed to the activities of a discarnate entity; the phenomena may include apparitions, poltergeist disturbances, cold drafts, sounds of footsteps and voices, and various odors."
Ghosts are a controversial anomalous phenomenon. According to a poll conducted in 2005 by the Gallup Organization, about 32% of Americans believe in the existence of ghosts. The term ghost has been replaced by apparition in parapsychology, because the word ghost is deemed insufficiently precise.
