Going overboard is read as falling out of a safe structure into overwhelming emotion. Dream books link it to feeling left behind, or to having gone too far in something.
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.