The threshold is one of the oldest symbols of crossing over — into marriage, a new home or a new stage. Dream books read hesitating at it as a decision you are standing right on the edge of.
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.