The letter L is a right angle, a corner turned, so tradition reads it as a change of direction or a support you lean on. It may also point to someone whose name starts with it.
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.