If you have dreamed of opening someone else's house with a key in your dream: You should not ignore the advice and suggestions of your environment, you should be more flexible in the face of events. Opening someone else's house with a key in a dream means that the person's relative will be aware of their secrets and privacy. In the opinion of some dream scholars, learning someone else's secrets means destroying their home, making them uneasy and using them for their evil purposes. It is interpreted with the person's bad thoughts.