(1)乾いたや花粉など、大気中のあちこちを吹き飛ばされる細かな粒子状の物質
(2)fine powdery material such as dry earth or pollen that can be blown about in the air; "the furniture was covered with dust"
さらに詳しく
(1)軽くてふかふかした素材
(2)any light downy material
