A turnstile lets one person through at a time. Dream books read it as controlled access — a step you must take alone, and a gate that may stick when you are not ready.
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.