Resembling or having the characteristics of a plume or feathers; feathery. The plumy clouds drifted lazily across the sky, casting soft shadows on the ground.
Having a soft, full, and fluffy appearance or texture. The plumy pillows on the couch made it look incredibly inviting and comfortable.
Rich, luxurious, or opulent in appearance or quality. She wore a plumy velvet gown that shimmered under the ballroom lights.