Relief in a dream is read as tension finally released. Dream books link it to a weight lifting, a fear that turned out smaller than expected, or a resolution the mind has been waiting for.
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.