Islamic Interpretation of Dreams (Ibn-i Sirin):
In a dream, a spider represents a malicious woman, or a weak, perfidious and a distant man.
A spider in a dream also represents a weaver, an ascetic or a monk.
Ifone sees a spider in his dream, it may mean that he will meet a pious and a religious man. Weaving a web in a dream means becoming weak.
A spider in a dream also could represent a pleasing wife.
If one sees a spider hanging down from the ceiling in a dream, it indicates a severe winter in that area.
(Also see Tarantula)