dim·mer 
/ˈdɪmɚ/ noun
plural dim·mers /ˈdɪmɚ/ noun [count] : a device that allows you to control the brightness of a light
▪ All the lights in the room are on dimmers. [=all the lights can be made brighter or dimmer because they have special switches] ▪ a dimmer switch
▪ All the lights in the room are on dimmers. [=all the lights can be made brighter or dimmer because they have special switches] ▪ a dimmer switch
