Definition of "Plume" :

noun: the light horny waterproof structure forming the external covering of birds

noun: a feather or cluster of feathers worn as an ornament

noun: anything that resembles a feather in shape or lightness

"A plume of smoke."

verb: dress or groom with elaborate care

verb: form a plume

verb: clean with one's bill

verb: deck with a plume

"A plumed helmet."

verb: be proud of

verb: rip off; ask an unreasonable price