1 (also ˈpower point(informal 非正式)plug) a place in a wall where a piece of electrical equipment can be connected to the electricity supply 电源插座 ☞picture at plug 见plug插图

2 a hole in a piece of electrical equipment where another piece of equipment can be connected 插孔；插口

3 a hole that sth fits into 窝﹔孔: your eye socket 眼窝