Seeing dust in a dream can symbolize purity, strength, and the cycle of life. The interpretation of this dream can vary based on your current life situation, emotions, and experiences. Your personal feelings and experiences related to dust can help you understand the meaning of this dream. It may serve as a message from the deeper levels of your soul, guiding you on your life's path.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Dust" (page 132).
In a dream, dust signifies money. Seeing a cloud of dust in a dream means a mysterious happening no one knows how to get out of it. Washing one's hands from dust in a dream means becoming poor. Dust that accumulates after a rainstorm or a thunderstorm and lightning in a dream means drought or adversities. A cloud of dust which is produced from a brisk movement of a car or a horse in a dream means controlling one's affairs, indulging in falsehood or enticing trouble. Dusting one's store and throwing the dirt on the sidewalk in a dream means business losses. If a merchant sees his merchandises covered with dust in a dream, it means depression and unsalability of his merchandise. (Also see Specs of dust)
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.