A collage is read as a life assembled from fragments: memories, roles and influences cut out and pasted together. It often reflects the work of making a whole picture out of scattered parts.
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.