A quilt, usually with a washable cover, that may be used in place of a bedspread and top sheet.(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.
Use "duvet" in a sentence
"Sharing the duvet is a fair price to pay for having someone around to look after, who looks after you, too."
"A thin duvet of the same pattern rested at the foot of the bed and the pillows at the top were in a darker but similar shade of blue."
"Still, I've never seen a comforter itself called a duvet or down in English in Russian there is a word пуховик, meaning just that"