Plume meaning : A feather of a bird, especially a large or showy one used as a decoration. A cluster of feathers worn as an ornament, especially on a helmet; a hackle. A token of honour or prowess; that on which one prides oneself; a prize or reward. The vane of a feather, especially when on a quill pen or the fletching of an arrow. Short for plume moth. Things resembling a feather.