A wall is read as a boundary: protection from one side, an obstacle from the other. Dream books ask which side of it you are on. Building a wall points to setting limits or shutting something out, while a wall that blocks your path is read as a hurdle you cannot yet see past. Climbing over is taken as determination; a crack or a crumbling wall suggests defences giving way. Walls closing in is a common anxious version, read as feeling pressed by circumstances. Writing on a wall is taken as a message hard to ignore.
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.