Floating without weight is read as relief from burdens and a rare lightness of spirit. It can also point to feeling ungrounded, with nothing to hold on to.
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.