The dream analysis of the symbol “backyard” usually means your private space. In your dream, if you see a messy backyard, it means you might need to tidy up certain aspects of your life, which may be exposed to public view. Just like a backyard, which is supposed to be private, unless a person goes around to the back, to look at it. Since we can’t always prevent all outsiders from peeking into our personal space, we should tidy it up so that there is nothing extraordinarily outrageous to see.