Lips are read as communication and sensuality — what you say, and what you long to share. Pressed lips suggest secrets; soft or full ones, affection.
When this appeared in your dream, what were you feeling?
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.