duster UK /ˈdʌstə/US /ˈdʌstɚ/noun 11forms 1 noun11 •An object, such as a cloth or a purpose-made soft and puffy pad or mitt, used for dusting surfaces etc. •A block of felt strips, shaped ergonomically, used to remove chalk from a chalkboard. •A loose-fitting long coat. •Someone who dusts. •A duststorm. •A high pitch toward the batter. •(Philippines) A type of loose dress worn at home as well as within the vicinity of one's home. •A revolving wire-cloth cylinder which removes the dust from rags, etc. •A blowing machine for separating the flour from the bran. •A dry drillhole, one that does not produce oil or gas. •(informal) A vehicle-mounted, multi-barrelled anti-aircraft gun. formsdusters