<p><strong>Noun</strong></p><ul><li>down, or soft feathers, from the breast of the female eider duck.</li><li>a heavy quilt or comforter, especially one filled with eiderdown.</li><li>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.</li></ul>