Islamic Interpretation of Dreams (Ibn-i Sirin):
(Belt; Cincture; Waistband) A waist belt in a dream represents a wife who owns a house or a property.
A waist belt in a dream also could represent happy children, and for rich people it represents their housekeeper or their servants.
As for everyone else, a waist belt in a dream means adornment, or money depending of its quality and value in the dream.
(Also see Belt; Cincture; Waistband)