(1)それが見えないようにする事で何かの存在を秘密にする行為
(2)the act of concealing the existence of something by obstructing the view of it; "the cover concealed their guns from enemy aircraft"
さらに詳しく
(1)粘着物で覆うまたは着色する
(2)cover or stain with slime; "The snake slimed his victim"
