1. Resembling a plume
   "the dog's plumy tail";
   - plumelike
    
2. Having or covered with or abounding in plumes
   "the plumy serpent";
   - plumed
    
3. Adorned with feathers or plumes
   "a plumy hat";
   - feathery, feathered

Derived forms: plumier, plumiest

See also: adorned, decorated, feathered