Paranormal: The realm of occurrences and phenomena removed from those to which people are accustomed and comprehend, and presently uncategorized by standard academia.
Parapsychology: The avenue of paranormal studies and research relating chiefly to psychic abilities (e.s.p., telepathy) and spiritual phenomena.
Poltergeist: German for "noisy ghost." This is an extremely rare occurance wherein random objects are moved and sounds produced by an unseen force, the sole purpose of which seems to be to draw attention to itself. The phenomenon always involves a specific individual, frequently a child or adolescent.
Residual (Haunting): Psychic imprint of a scene which is repeatedly played out, where the witness of such phenomenon essentially is peering into the past. The ghostly participants of these time-displacements often seem unaware of their living observers.