If you have dreamed Black widow, one of the species of the spiders, the most common explanation of this dream symbolizes apprehension and/ or instability. The Black widow is known as having dangerous aspects of its personality, especially the feminine ones. It also symbolizes dark powers, unknown secrets and hidden desires. If you are in the relationship, you may feel oppressed and unable to be yourself. Otherwise, you are the one in these relationships that is trying to tie that person up and have control all over his actions. In the reality the spider Black widow is known as destroying its partner, therefore your dream symbolizes the feminine aspects of you and how much of the domination in your personality they take, no matter if you are men or women.
Read more about dreaming of Black Widow in other dream meanings interpretations.