no a ghost is the soul of someone who has passed from the living world but is stuck in the living world even after death, because it should've entered the medium (the space between the living and the dead world) by now to be judged for it's fate it remains in the living world trying to find a way back. some take advantage of this and haunt your dreams, reality, and literally anything that's within their timeline before death. ghost isn't really a good thing to call them they're more like spirits or apparition at least that's my theory