dusterPronunciation: /ˈdʌstə/Translate duster | into French | into German | into Italian | into Spanish Definition of duster noun 1a cloth or pad for dusting furniture. 2 (also duster coat) a woman’s loose, lightweight full-length coat without buttons, of a style originally worn in the 1920s when travelling in an open car. North American a short, light housecoat. 3US informal a dust storm. duster in other Oxford dictionaries Definition of duster in the US English dictionary