An appointment is a fixed point in time that you have agreed to keep. Dream books read it as commitment and expectation; missing one points to worry about obligations slipping.
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.