dorset down \| ̷ ̷ ̷ ̷|dau̇n\noun Etymology: from the county of Dorset, England, where it was originally bred 1.usually capitalized both Ds: an English breed of short-wooled mutton-type sheep derived from the Hampshire Down 2.pluraldorset downsoften capitalized both Ds: a sheep of the Dorset Down breed