What is the meaning of dust?

noun

• Fine powdery material such as dry earth or pollen that can be blown about in the air.
  • usage: "the furniture was covered with dust"
• The remains of something that has been destroyed or broken up.
  • synonyms: debris, junk, rubble, detritus
• Free microscopic particles of solid material.
  • usage: "astronomers say that the empty space between planets actually contains measurable amounts of dust"

verb

• Remove the dust from.
  • usage: "dust the cabinets"
• Rub the dust over a surface so as to blur the outlines of a shape.
  • usage: "The artist dusted the charcoal drawing down to a faint image"
• Cover with a light dusting of a substance.
  • usage: "dust the bread with flour"
• Distribute loosely.
  • usage: "He scattered gun powder under the wagon"
  • synonyms: scatter, sprinkle, dot, disperse