dusty miller noun2 •A formulaic phrase for a miller, related to the dust generated in the milling process.Hey, the dusty miller, / And his dusty coat! / He will win a shilling, / Ere he spend a groat. / Dusty was the coat, / Dusty was the colour; / Dusty was the kiss, / That I gat frae the miller. — 1829 •Any of several species of plants with leaves of a dusty appearance: Centaurea cineraria, Jacobaea maritima, Artemisia stelleriana, Spyridium parvifolium, and Silene coronaria, syn. Lychnis coronaria. formsdusty millers