duster

n. 1. One who, or that which, dusts; a utensil that frees from dust. Specifically: (a) (Paper Making) A revolving wire-cloth cylinder which removes the dust from rags, etc. (b) (Milling) A blowing machine for separating the flour from the bran. (c) A dustcloth or a brush used for removing dust from objects or surfaces. [ 1913 Webster ]

2. A long light overgarment; specifically (a) a light over-garment, formerly worn when traveling in open vehicles to protect the clothing from dust. [ U.S. ] (b) A light housecoat worn by women. (c) A light overcoat worn by women, often having no lining. [ 1913 Webster +PJC ]

3. A device for spreading a powder, especially one for spreading insecticide on plants. [ PJC ]

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. [ PJC ]

5. A dust storm. [ PJC ]