noun
fur coat; fur garment
A coat or garment made of animal fur, worn for warmth in cold weather. This is the primary modern meaning.
寒い地方では、毛衣が必需品です。
In cold regions, a fur coat is a necessity.
noun
down-filled clothing; garment made with bird down
Clothing padded or filled with the soft down of birds, such as a down jacket. This sense is less common than the fur-coat meaning.
昔の毛衣は、鳥の羽毛を使って作られました。
Old-fashioned down garments were made using bird feathers.
Compound of 毛 (ke, 'fur, hair') and 衣 (koromo, 'clothing, robe'). The reading けごろも is a kun'yomi compound. The single-kanji form 裘 is a classical Chinese character for fur coat, rarely used in modern Japanese.