Siding is a wooden, plastic, or metal covering on the outside walls of a building. (建筑外墙木制、塑料制或金属制的)壁板
noun [专属名词] 侧线;旁轨,边宽
The train has shunted to a siding. 这列火车已转至旁轨。
verb [vt. 及物动词] 支持(side 的现在分词);给……装上侧面;收拾,整理
There has been much speculation that they might be siding with the rebels. 有很多猜测说他们可能会支持叛乱者们。