1. the soul of a dead person, a disembodied spirit imagined, usually as a vague, shadowy or
evanescent form, as wandering among or haunting living persons.
2. a mere shadow or semblance; a trace: He's a ghost of his former self.
3. a remote possibility: He hasn't a ghost of a chance.
Apparitions are ghost who appear solid, partial, visible or slightly invisible. Most of the time,
they are somewhat transparent and appear as they did when living. An apparition is aware of the living and can interact either friendly or unfriendly. They are thought to have unfinished business in this world.
A ghost that appears to let someone know that danger or death is about to befall a loved one. Reported as being a solid or transparent ghost.
A ghost that looks, walks, talks and appears to a family member of the person it looks like at the exact moment the person it looks like dies. People have even claimed to have seen their own doppleganger. Doppleganger means "double goer" in German. Reported as being solid or transparent.
Ghosts attached to a specific territory like a house, graveyard or even a schoolyard
that had a significance to them in life. Unlike residual ghosts (hauntings), they acknowledge living people and may even resort to violence to get them out of the territory.
A disruptive ghost, whose activities are often violent, A poltergeist might move objects or create dangerous situations for those in a household.
They are said to be ghosts who choose to channel their energy in the form of an orb of bright light, some of these can be different colors. Transparent orbs usually have logical explanations for their appearances.
A residual haunting is the most common type of haunting, and can be described as a playback of a past event (sometimes as a designated time). The apparitions are not intelligent spirits, but rather "recordings" of a past event. Residual hauntings are simply expressions of stored energy.
An apparition that acknowledges your presence. These ghosts are reported as apparitions.