Definition of "eiderdown" [eiderdown]

• The down of the eider duck, used as stuffing for quilts and pillows. (noun)
• A quilt stuffed with the down of the eider duck. (noun)
• A warm napped fabric. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Under the eiderdown was a snowy light counterpane."
• "Nomith lost the top spot after he was unable to spell "eiderdown," the down of the eider duck, used as stuffing for quilts and pillows."
• "In 1947 Cassin began designing and making equipment, starting with pitons, hammers, ice-axes and harnesses before moving into articles of clothing such as eiderdown jackets."