Definition of: plume

(plm) noun
1. A feather, especially when long and ornamental.
2. A large feather or tuft of feathers worn as an ornament, especially on a helmet; a panache.
3. Her. Three feathers, unless more are specified.
4. A featherlike form or part; the plumose appendage of a seed.
5. Plumage.
6. A decoration of honor; a prize.
—v.t. plumed, plum·ing
1. To adorn, dress, or furnish with or as with plumes.
2. To smooth or dress (itself or its feathers); preen.
3. To congratulate or pride (oneself): with on or upon. [<F <L pluma small soft feather]
PLUME (def. 3)
Prince of Wales.