Dream about black box signals a controlling relationship. You need to adjust your tone of voice. Perhaps you are being too conventional, unhip or dull. It is your stubbornness. You need to consider and confront material from your subconscious.
Black box dream is a clue for a time where you feel vulnerable and helpless. You are undecided between two choices you have to make. You need to be careful in who you trust and who you confide in. This signifies the conscious mind. You are quick witted and quick-thinking.
If you dreamt about black box:
You generally like to think of yourself as a practical and down-to-Earth person. Today you might depend on intuition more than usual. People around you might seem to be acting peculiarly, and your insight could give you hints as to their true motivations and how to deal with them. Relations with colleagues could especially benefit from this. Follow your heart!