The monstrance exists to show something sacred openly, so tradition reads it as a wish to see the holy clearly. It can also stand for a value you want to hold up and honour in plain view.
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.