A poltergeist throws things around unseen, and tradition reads it as suppressed emotion making noise — frustration or tension that keeps disturbing the household because it has not been named.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.