a cloth or tool used for removing dust, or a long coat worn to protect clothes from dust.
From 'dust' (Old English 'dust,' probably from Proto-Germanic) plus '-er' suffix, describing something that removes dust or protects from it.
Dusters as long coats were super practical in the early 1900s when people rode horses and cars kicked up tons of dust—they showed up in Western movies as the classic outlaw look, but they started as actual protective gear.
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