An arrival is read as the end of one passage and the beginning of what comes next. Dream books link the arrivals hall to reunion, relief, or the strangeness of a new place that still has to be learned.
Has this come up in your dreams before? What was going on in your life then?
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.