duster

n.
  1. One who, or that which, dusts; a utensil that frees from dust.
  2. A long light overgarment;
  3. A device for spreading a powder, especially one for spreading insecticide on plants.
  4. (Baseball) A pitch intentionally thrown by a pitcher directly at or very close to the batter, intended to make the batter stand further away from home plate; also called a dust-back pitch or a dust-back.
  5. A dust storm.
    1. A dustcloth or a brush used for removing dust from objects or surfaces.
    2. a light over-garment, formerly worn when traveling in open vehicles to protect the clothing from dust.
    3. A light housecoat worn by women.
    4. A light overcoat worn by women, often having no lining.