American English

Definition of dimmer switch noun from the Oxford Advanced American Dictionary

     

    dimmer switch

     noun
    noun
    NAmE//ˈdɪmər ˌswɪtʃ//
     
    (also dimmer)
     
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  1. 1a switch that allows you to make an electric light brighter or less bright
  2. 2a switch that allows you to make the front lights on a car point downward
See the Oxford Advanced Learner's Dictionary entry: dimmer switch