A ghost an apparition of a dead person which is believed to appear or become manifest to the living, typically as a nebulous image.

A ghost is  a spiritual presence, energy or frequency that has extended from a person’s frequent habits, and most of the time this type of energies are an extension of someone who has passed a way or deceased.

People who have passed a way have a soul, which returns back to the Creator or goes to the place of rest – Shoel, underworld, Abyss, Hades,

But the presence of energy which is related to the kinetic energy (being the moral or immoral frequent habits of the person who passed a way), stays in the earthly realm in form of frequency, air, energy or spiritual presence.

And that energy, frequency or presence posses the ability to influence, travel in space, become a frequency that can stimulate dreams, communicate ideas, act as a form of familiar spirit (a spirit that belongs to a certain family), which has become to be referred to as a ghost or spiritual presence of the dead.