A passing acquaintance in a dream is read as a quality you have noticed but not yet made your own. Dream books link the figure to the surface of your social world and what lies just beyond it.
Where in your waking life have you met something like this lately?
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.