light

noun

1. Electromagnetic radiation in the wavelength range visible to the human eye (about 400–750 nanometers): visible light.
2. Electromagnetic radiation in the wavelength range visible to the human eye or in nearby ranges (infrared or ultraviolet radiation).
3. Electromagnetic radiation of any wavelength.
4. A source of illumination.
5. A lightbulb or similar light-emitting device, regardless of whether it is lit.
6. A traffic light, or (by extension) an intersection controlled by traffic lights.
7. Spiritual or mental illumination; enlightenment, useful information.
8. Facts; pieces of information; ideas, concepts.
9. A notable person within a specific field or discipline.
10. The manner in which the light strikes a picture; that part of a picture which represents those objects upon which the light is supposed to fall; the more illuminated part of a landscape or other scene; opposed to shade.
11. A point of view, or aspect from which a concept, person or thing is regarded.
12. A flame or something used to create fire.
13. A cigarette lighter.
14. A firework made by filling a case with a substance which burns brilliantly with a white or coloured flame.
15. A window in architecture, carriage design, or motor car design: either the opening itself or the window pane of glass that fills it, if any.
16. The series of squares reserved for the answer to a crossword clue.
17. A cross-light in a double acrostic or triple acrostic.
18. Open view; a visible state or condition; public observation; publicity.
19. The power of perception by vision: eyesight (sightedness; vision).
20. The brightness of the eye or eyes.