A crevasse is a hidden split in the ice, and tradition reads it as a danger that lies just under a smooth surface. Stepping around one is seen as careful attention to what is not said.
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.