A handprint is a mark someone left behind, so tradition reads it as presence, influence or a memory that has stayed. Your own handprint can stand for a wish to leave something lasting.
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.