down2 Syllabification: (down)Pronunciation: /doun/Translate down | into French | into German | into Italian | into Spanish Definition of down noun soft fine fluffy feathers that form the first covering of a young bird or an insulating layer below the contour feathers of an adult bird. soft fine fluffy feathers taken from ducks or their nests and used for stuffing cushions, quilts, etc.; eiderdown. fine soft hair on the face or body of a person:the little girl had a covering of golden down on her head short soft hairs on some leaves, fruit, or seeds. Origin: Middle English: from Old Norse dúnndown in other Oxford dictionaries Definition of down in the British & World English dictionary