柯林斯词典dimmer /ˈdɪmə/ (dimmers) 1. N-COUNT A dimmer or a dimmer switch is a switch that allows you to gradually change the brightness of an electric light. (电灯的)调光器 返回 dimmer剑桥词典a device for changing the brightness of an electric light , often combined with a switch to turn the light on and off 亮度调节器 返回 dimmer