Definition of plumes:
(n) :
The vane (“flattened, web-like part”) of a feather, especially when on a quill pen or the fletching of an arrow.
(n) :
A cloud formed by a dispersed substance fanning out or spreading.
(n) :
An upward spray of mist or water.
(v) :
(transitive, also figurative) To adorn, cover, or furnish with feathers or plumes, or as if with feathers or plumes.
(v) :
(transitive, reflexive) Chiefly of a bird: to arrange and preen the feathers of, specifically in preparation for flight; hence (figurative), to prepare for (something).
(v) :
(transitive, reflexive, by extension) To congratulate (oneself) proudly, especially concerning something unimportant or when taking credit for another person's effort; to self-congratulate; to preen.