Synchronised swimming is read as harmony with others, every movement matched while much of the effort stays hidden underwater. It reflects the work of keeping in step with a group.
Does the traditional reading fit your dream, or did it mean something else to you?
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.