mass noun
1- paper that is pasted in vertical strips over the walls of a room to provide a decorative or textured surface墙纸, 壁纸。
1.1
- figurative a thing, especially music, that provides a bland or unvaried background〈喻〉提供柔和（或单一）背景的东西; 背景音乐：
soothing sonic wallpaper.
舒缓的背景音乐。
1.2
- Computing an optional background pattern or picture on a computer screen【计算机】壁纸。