- plume [plo͞om]n.[OFr < L pluma, downy part of a feather, small soft feather < IE base * pleus-, to pluck out, fluff of wool, hair > FLEECE]1.a) a feather, esp. a large, fluffy, or showy oneb) a cluster of such feathers2. an ornament made of a large feather or feathers, or of a feathery tuft of hair, esp. when worn on a hat, helmet, etc. as a mark of distinction3. any token of worth or achievement; prize4. plumage or down5. something like a plume in shape or lightness [a plume of smoke]6. Biol. a featherlike formation or part7. Geol. a plume-shaped mass of molten rock that rises through the crust from the mantle of the earth and causes volcanic activityvt.plumed, pluming1. to provide, cover, or adorn with plumes2.a) to smooth the feathers of (itself)b) to preen (its feathers): said of a bird3. to pride (oneself)
English World dictionary. V. Neufeldt. 2014.