Opera turns feeling into grand song, and an opera house is read as emotions too big for ordinary words. Tradition also links it to ceremony, refinement and a wish for life to feel larger.
Has this come up in your dreams before? What was going on in your life then?
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.