Definition

1. Noun:
   • A device, typically a type of rheostat or solid-state switch, that is used to reduce the electrical current flowing to a light source, thereby controlling and lowering its level of illumination or brightness.

Usage

• A dimmer is installed in place of a standard light switch to allow for adjustable lighting.
• It is commonly used to create ambiance, save energy, or reduce glare in rooms like dining rooms, living rooms, and bedrooms.
• The word is often part of the compound term "dimmer switch."

Examples

• Noun:
  • We installed a dimmer in the dining room to set a softer mood for dinner parties.
  • Turn the dimmer up; I can't read in this light.
  • Some modern dimmers can be controlled remotely via a smartphone app.

Advanced Usage

• "to be on a dimmer": Refers to a light source whose brightness is controlled by a dimmer device.
  • All the recessed lights in the ceiling are on a single dimmer.
• In automotive contexts, a dimmer switch controls the switching between high and low beams on a vehicle's headlights.

Variants and Related Words

• Dim (verb): To make or become less bright or distinct.
  • She dimmed the lights before starting the movie.
• Dimmable (adjective): Describing a light fixture or bulb that is compatible with and designed to work with a dimmer switch.
  • Make sure you buy dimmable LED bulbs for that fixture.

Synonyms

• Rheostat (specifically for the variable resistor type)
• Light regulator
• Dimmer switch (common compound term)

Related Phrases

• Dimmer switch: The complete wall-mounted unit housing the dimmer control.
  • He replaced the old toggle switch with a rotary dimmer switch.

Noun

1. a rheostat that varies the current through an electric light in order to control the level of illumination