Invisibility is read in two ways: the freedom to watch without being judged, or the sorrow of being overlooked. Dream books ask whether you chose to vanish or simply were not noticed.
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.