An initiation marks the passage from outsider to member. Tradition reads it as crossing a threshold in life, with the trials of the rite standing for what that change asks of you.
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.