Dreaming of dust represents your past or past memories that are long forgotten, neglected or ignored. It can also represent the passage of time or the last time you felt the feelings that are portrayed in the dream. Dreaming that you are cleaning dust represents those ideas, thoughts, beliefs, attitudes, etc… that can be raised to a new level by your inner nature. Alternatively, dreaming of dust may represent and allergy or something that you are adverse to – this can be an ideology, belief, way of living, etc…