This is the Dictonary of Ghostly Terms from The Ghost Hunter's Guide book by Troy Taylor. Great resource for learning more about the paranormal!!

Agent:  A living person at the site of a haunting. Some human agents act only as witnesses to paranormal events while others are believed to be the method by which the hauntings occur.  Some agents may cause phenomena to increase, while other may be the entire source of the activity. How this works is as yet unexplained.

Apparition: A spectral image that is sometimes referred to as a ghost, but is more like an imprint with distinct features that enables the witness to recognize it as a person or specific shape. They are usually connected to residual hauntings rather than spirit-related ones.

Apport:  A physical object that can materialize and appear at will and can include coins, watches, jewelry and even food. They are often connected to spirits who interact with the living as the spirits cause items to appear and disappear in an effort to make themselves known.

Automatic Writing:  A method used by spirit mediums to obtain information from the next world. It is believed that spirits take control of the medium and cause them to write unconscious information on paper.

Banshee: A death omen or spirit that attaches itself to certain families.

Bogey:  A spirit that is particularly antagonistic toward humans, traveling alone or in groups to cause trouble.

Channeling:  A modern method of spirit communication in which the spirits pass information directly to the medium, who then repeats the information for the listener.

Clairaudience:  The experience of receiving paranormal information through auditory impressions, voices and whispers. Many psychics are said to receive information from the spirit world in this manner. It can also be used to describe voices and whispers heard in haunted locations.