Five sides recall the five senses and the outline of a person with head, arms and legs. For many dreamers the word also brings the famous building to mind, and then it is read as power, defence and secrecy.
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.