‖n.; pl. Plumæ [ L. ] (Zool.) A feather. [ 1913 Webster ]

n. [ F., from plume a feather. ] (Zool.) The entire clothing of a bird. [ 1913 Webster ]

☞ It consist of the contour feathers, or the ordinary feathers covering the head, neck, and body; the tail feathers, with their upper and lower coverts; the wing feathers, including primaries, secondaries, and tertiaries, with their coverts; and the down which lies beneath the contour feathers. See Illust. under Bird. [ 1913 Webster ]

n. [ Cf. F. plumasseau. ] A plume or collection of ornamental feathers. [ 1913 Webster ]

‖n. [ F. ] One who prepares or deals in ornamental plumes or feathers. [ 1913 Webster ]