light

1. Electromagnetic radiation in the wavelength range visible to the human eye (about 400–750 nanometers): visible light. (uncountable) · As you can see, this spacious dining-room gets a lot of light in the mornings.
2. Electromagnetic radiation in the wavelength range visible to the human eye or in nearby ranges (infrared or ultraviolet radiation). (countable, uncountable) · black light
3. Electromagnetic radiation of any wavelength. (countable, uncountable)
4. A source of illumination. (countable) · Put that light out!
5. A lightbulb or similar light-emitting device, regardless of whether it is lit. (countable, uncountable) · We turned off all the lights and went to sleep.
6. A traffic light, or (by extension) an intersection controlled by traffic lights. (countable, uncountable) · To get to our house, turn right at the third light.
7. Spiritual or mental illumination; enlightenment, useful information. (countable, figuratively, uncountable) · Can you throw any light on this problem?
8. A notable person within a specific field or discipline. (countable, uncountable) · Picasso was one of the leading lights of the cubist movement.

Plural lights