You’ll be lucky if you dreamed of cobwebs in an acceptable place such as a wine cellar, attic, etc.
; but if they were where they shouldn’t be, for example on clothes, furniture, or books, they predict difficulties through secretly hostile competition; however, if you brushed them away, you will easily overcome the difficulties.
See also Spider(s) and Web.... The Complete Guide to Interpreting Your Dreams
Cobwebs spun by spiders could symbolize the trap in which you find yourself in real life. It also represents loneliness, lack of communication, and disputes. On the other hand, if the spider in your dream has woven a beautiful web that you admire upon contemplation, it is a sign that the forces of the universe are in your favor to help you in your projects. Lastly, dreaming that the cobwebs are invading your home reveals that the nostalgia frequently takes over your mind, which impedes you from enjoying the present. You are too worried about events of the past and your energy is dispersed in things that cannot be changed.... The Big Dictionary of Dreams
Dreams of cobwebs symbolize that you are discovering a part of your power and wisdom that has been long forgotten, neglected, or discarded. This dream can also represent seduction and your ability to lure people to. See Shadow, Spider and Web.... Strangest Dream Explanations