poltergeist UK /ˈpɒl.tə.ɡaɪst/US /ˈpoʊl.tɚˌɡaɪst/ noun1 •An unseen ghost which makes noises and causes disruption, especially by causing physical objects to move or fly about.A poltergeist haunts the house by moving objects around, making chain-rattling noises and throwing things.The chapel is haunted by a demonic poltergeist. formspoltergeister · poltergeists