Dreaming of dust symbolizes losing or burying an emotion, a past. It is usually related to the gains and losses in the dreamer's life experience. It may be an important person in your life, or it may be a certain emotion, a precious object. It embodies your inner feelings of loss, endless sadness, helpless forgetting and other emotions.

Dreaming that there is a lot of dust can get benefits.

Dreaming of loess falling into the door of the house from the sky means good luck.

Original Dreamsmeaning Book

Seeing the dust, the Lord has something to gain. Dreamsmeaning Book

Sweep the dust, fame fell to the ground. Dreamsmeaning Book