A ghost is a spirit from the deceased humans or animals. You can spot or hear whispers. You may see something that moves or a shadow may appear. You can also hear them like whispers but they use electiricity to make themselves notaceable, if you have a flashlight a ghost will use that electricity you may see it fl iker on off on off. Most peoole will get scared of them but there are people called " Ghost Hunters ", these people go to a hounted hotel,house,building and look for these spirits and talk them and spot them.
Ghost can be posses many thing such as clowns,dolls,some animals. But an "exorcism" can free the demon or any spirit out of the soul.