noun
a ghost or other supernatural being supposedly responsible for physical disturbances such as loud noises and objects being moved or destroyed
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The family claimed to have experienced unexplained phenomena in their home, leading them to believe it was haunted by a poltergeist.
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I heard that old abandoned house is haunted by a poltergeist, so I wouldn't go near it if I were you.
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Don't be scared, it's just a bunch of poltergeist activity going on in that house.
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The political unrest in the country can be compared to a poltergeist, causing chaos and disruption everywhere.