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- Dictionarydimmer/ˈdɪmə/
noun
- 1. a device for varying the brightness of an electric light.
- 2. a headlight with a low beam. US
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noun
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A dimmer is a device connected to a light fixture and used to lower the brightness of the light. By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output. Although variable-voltage devices are used for various purposes, the term dimmer is generally reserved for those intended to control light output from resistive incandescent, halogen, and (m... Wikipedia