The noun dust has 3 senses (first 2 from tagged texts)
1. (42) dust -- (fine powdery material such as dry earth or pollen that can be blown about in the air; "the furniture was covered with dust")
2. (15) debris, dust, junk, rubble, detritus -- (the remains of something that has been destroyed or broken up)
3. dust -- (free microscopic particles of solid material; "astronomers say that the empty space between planets actually contains measurable amounts of dust")
Overview of verb dust
The verb dust has 4 senses (first 2 from tagged texts)
1. (3) dust -- (remove the dust from; "dust the cabinets")
2. (1) dust -- (rub the dust over a surface so as to blur the outlines of a shape; "The artist dusted the charcoal drawing down to a faint image")
3. dust -- (cover with a light dusting of a substance; "dust the bread with flour")
4. scatter, sprinkle, dot, dust, disperse -- (distribute loosely; "He scattered gun powder under the wagon")