An answer in a dream stands for resolution you are reaching toward. Knowing it is read as confidence; forgetting it as a fear of being caught without words when it matters.
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.