What is a ghost?  A ghost is spirit or apparition is believed to be an energy, soul, or person who has died and gotten stuck in between this plane of existence and another.  Researchers believe that these spirits don't believe they are dead. Ghosts can be appear in apparitions, smells, sounds, touch and sometimes you can just sense the presence.

What is a haunting? A haunting is like a recording of past event in an  environment such as a house, certain place, or thing.  The most common hauntings are residual, which means it's like a play back of the same event over and over - like a film or video.