Shopping for clothes is read as looking for a new way to present yourself. Dream books see it as investment in self-image, or a wish to step into a different part of life.
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.