A swimsuit is read as readiness to enter the water of feelings. It also raises body confidence — whether you feel free in it, or exposed in front of others.
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.