A thief is traditionally read as the fear of losing something of value — time, trust, energy or credit for your own work. Dream books first ask what was taken, because that is usually what feels unguarded in waking life. Catching the thief is read as taking back control, while a burglar slipping into your home points to a boundary that feels too easy to cross. If you are the one stealing, tradition sees a need you do not feel allowed to meet openly. It can help to notice where in your days something seems to slip away without your consent.
Does the traditional reading fit your dream, or did it mean something else to you?
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.