Broken glass is read as shattered expectations, a fragile situation or a boundary broken. Walking carefully around it traditionally stands for treading lightly after a disappointment. Breaking glass yourself is usually read as releasing frustration or breaking free of a restriction. Stepping on it is linked to being hurt by something you did not see coming, while sweeping up the shards points to repairing a situation patiently. Some traditions read glass broken at a celebration as a happy sign. It can help to ask what in your life feels fragile at the moment.
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.