Pronunciation: (ī'dur-doun"), [key]
1. down, or soft feathers, from the breast of the female eider duck.
2. a heavy quilt or comforter, esp. one filled with eiderdown.
3. a warm, lightweight knitted or woven fabric of wool, cotton, or man-made fibers, napped on one or both sides, used for sleepwear, infants' clothing, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.