A waterfall stands for release — emotion or energy pouring out after being held back. Dream books also link it to cleansing, and to power that is beautiful from a distance and overwhelming up close. Standing under it is read as being renewed or washed clean, while falling over one points to feeling carried away by events. A dried-up waterfall suggests energy that has run low. It can help to ask what has been building up and is ready to flow.
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.