ei ‧ der ‧ down /ˈaɪdədaʊn $ -dər-/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Language: Icelandic ; Origin: æthur type of duck + ⇨ ↑ down 2 ]
a thick warm cover for a bed, filled with duck feathers ⇨ duvet
ei ‧ der ‧ down /ˈaɪdədaʊn $ -dər-/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Language: Icelandic ; Origin: æthur type of duck + ⇨ ↑ down 2 ]
a thick warm cover for a bed, filled with duck feathers ⇨ duvet
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012