From WordNet (r) 3.0 (2006):
plume
n 1: anything that resembles a feather in shape or lightness; "a
plume of smoke"; "grass with large plumes"
2: a feather or cluster of feathers worn as an ornament
3: the light horny waterproof structure forming the external
covering of birds [syn: feather, plume, plumage]
v 1: rip off; ask an unreasonable price [syn: overcharge,
soak, surcharge, gazump, fleece, plume, pluck,
rob, hook] [ant: undercharge]
2: be proud of; "He prides himself on making it into law school"
[syn: pride, plume, congratulate]
3: deck with a plume; "a plumed helmet"
4: clean with one's bill; "The birds preened" [syn: preen,
plume]
5: form a plume; "The chimneys were pluming the sky"; "The
engine was pluming black smoke"
6: dress or groom with elaborate care; "She likes to dress when
going to the opera" [syn: preen, primp, plume, dress]