1. someone who works in a mill (especially a grain mill) • Hypernyms: craftsman, artisan, journeyman, artificer 2. machine tool in which metal that is secured to a carriage is fed against rotating cutters that shape it • Syn: milling machine • Hypernyms: shaper, shaping machine 3. any of various moths that have powdery wings • Syn: moth miller • Hypernyms: moth