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dimmer switch

noun

🔊/ˈdɪmə swɪtʃ/

🔊/ˈdɪmər swɪtʃ/

(also dimmer)

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a switch that allows you to make an electric light brighter or less bright调光器；调光开关；亮度调节开关
(North American English)
(British English dip switch)
a switch that allows you to make the front lights on a car point downwards（汽车的）前灯变光开关