The ghost generally referred in the life after the death.
The ghost was also connected with the spirit or the soul who left the body because of the death.
The definition from the ghost generally is different for each religion, civilisation, and the customs and traditions.
Despite generally the ghost referred to an annoying substance worldly life, in much culture, the ghost was not defined as the good substance and bad.
The devil's term, the devil, gondorowo, et cetera, more general was used to refer to the bad ghost.
Whereas the good ghost who it was considered had the capacity to help humankind, was mentioned with various different names, like the term to Datuk, Te Cu Kong (the ruler of the land, in the Kong Hu Cu religion), and other.
But in most religions, asked the ghost to help humankind to be to be banned.
The ghost was believed his existence by almost all humankind that trusted the existence of the Lord, despite only a small part that acknowledged had seen the ghost directly.
The existence of the ghost became pros and cons in many developed countries.
Some believing scientists the ghost only the illusion or their illusion that was trusting him, while some other scientists tried to prove him scientifically the existence of the substance that was contained in the ghost.
Antu often was depicted measured and had the shape of humankind (although there are those that mentioned him resembled the animal), usually was depicted "sparkled", "was shaded", "like the fog", or the shadow.
The ghost did not have the rough body like humankind, only body shadows (astral body).
Occasionally did not appear when being seen but in the other phenomenon like the movement of the object, light lived and was turned off with personally, the sound, etc., that did not have the explanation logik.
In West they who trusted the ghost occasionally regarded them as the not safe spirit after dying, and by that roamed about in Earth.
Ketidaksanggupan received the security it was explained as having the work that was not yet finished, like prey that looked for justice or avenged revenge after dying.
According to nonorthodox doktarin Khatolik, the ghost was said was ditempat between Heaven and Hell where the spirit of the baby who was not baptised remained.
Important for us knew that Protestant and Christian Evangelikal the main current that believed the realisation of the ghost in principle (principalities), but they did not trust the ghost (as the spirit of the person died) and placed the cruel ghost, like poltergeist, to the gnome's action, same like Islam.
In Khatolik and Christian Anglikan (and Christian Spiritualism), trusted the ghost was to be able to be received and discussed with the clergyman (clergy).
In Asian culture (like in Tiongkok), many people who trusted reincarnation (reincarnation).
The ghost was the spirit that did not want "in-reincarnation-would" because they had the problem that was not yet resolved, same like in the west.
Exorcist might help mangusir or meng-reincarnation-would the ghost (reincarnated).
In the Tiongkok tradition, apart from in-reincarnation-would, the ghost might become eternal (immortal) and became half of the god (demigod), or he might go to hell and suffered forever, or he might die once more and to the "ghost to the ghost".
The person Tiongkok also believed that some ghosts, especially they who died limp, killed humankind to obstruct their right to in-reincarnation-would.
Paranormal "killing" prey was recognised as Ti Si Gui (替死鬼), that is for Tiongkok same like the scapegoat.
In the Hindu religion, detailed discussions were about the ghost received in Garuda Purana, skripture from Vedic the tradition.