[lahyt] 
noun, adjective, -er, -est, verb, light⋅ed or lit, light⋅ing.| 1. | something that makes things visible or affords illumination: All colors depend on light. |
| 2. | Physics.
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| 3. | the sensation produced by stimulation of the organs of sight. |
| 4. | an illuminating agent or source, as the sun, a lamp, or a beacon. |
| 5. | the radiance or illumination from a particular source: the light of a candle. |
| 6. | the illumination from the sun; daylight: We awoke at the first light. |
| 7. | daybreak or dawn: when light appeared in the east. |
| 8. | daytime: Summer has more hours of light. |
| 9. | a particular light or illumination in which an object seen takes on a certain appearance: viewing the portrait in dim light. |
| 10. | a device for or means of igniting, as a spark, flame, or match: Could you give me a light? |
| 11. | a traffic light: Don't cross till the light changes. |
| 12. | the aspect in which a thing appears or is regarded: Try to look at the situation in a more cheerful light. |
| 13. | the state of being visible, exposed to view, or revealed to public notice or knowledge; limelight: Stardom has placed her in the light. |
| 14. | a person who is an outstanding leader, celebrity, or example; luminary: He became one of the leading lights of Restoration drama. |
| 15. | Art.
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| 16. | a gleam or sparkle, as in the eyes. |
| 17. | a measure or supply of light; illumination: The wall cuts off our light. |
| 18. | spiritual illumination or awareness; enlightenment. |
| 19. | Architecture.
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| 20. | mental insight; understanding. |
| 21. | lights, the information, ideas, or mental capacities possessed: to act according to one's lights. |
| 22. | a lighthouse. |
| 23. | Archaic. the eyesight. |
| 24. | having light or illumination; bright; well-lighted: the lightest room in the entire house. |
| 25. | pale, whitish, or not deep or dark in color: a light blue. |
| 26. | (of coffee or tea) containing enough milk or cream to produce a light color. |
| 27. | to set burning, as a candle, lamp, fire, match, or cigarette; kindle; ignite. |
| 28. | to turn or switch on (an electric light): One flick of the master switch lights all the lamps in the room. |
| 29. | to give light to; furnish with light or illumination: The room is lighted by two large chandeliers. |
| 30. | to make (an area or object) bright with or as if with light (often fol. by up): Hundreds of candles lighted up the ballroom. |
| 31. | to cause (the face, surroundings, etc.) to brighten, esp. with joy, animation, or the like (often fol. by up): A smile lit up her face. Her presence lighted up the room. |
| 32. | to guide or conduct with a light: a candle to light you to bed. |
| 33. | to take fire or become kindled: The damp wood refused to light. |
| 34. | to ignite a cigar, cigarette, or pipe for purposes of smoking (usually fol. by up): He took out a pipe and lighted up before speaking. |
| 35. | to become illuminated when switched on: This table lamp won't light. |
| 36. | to become bright, as with light or color (often fol. by up): The sky lights up at sunset. |
| 37. | to brighten with animation or joy, as the face or eyes (often fol. by up). |
| 38. | bring to light, to discover or reveal: The excavations brought to light the remnants of an ancient civilization. |
| 39. | come to light, to be discovered or revealed: Some previously undiscovered letters have lately come to light. |
| 40. | hide one's light under a bushel, to conceal or suppress one's talents or successes. |
| 41. | in a good (or bad) light, under favorable (or unfavorable) circumstances: She worshiped him, but then she'd only seen him in a good light. |
| 42. | in (the) light of, taking into account; because of; considering: It was necessary to review the decision in the light of recent developments. |
| 43. | light at the end of the tunnel, a prospect of success, relief, or redemption: We haven't solved the problem yet, but we're beginning to see light at the end of the tunnel. |
| 44. | see the light,
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| 45. | shed or throw light on, to clarify; clear up: His deathbed confession threw light on a mystery of long standing. |
The type of electromagnetic wave that is visible to the human eye. Visible light runs along a spectrum from the short wavelengths of violet to the longer wavelengths of red. (See photon.)
light
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light (līt)
n.
Electromagnetic radiation that has a wavelength in the range from about 4,000 (violet) to about 7,700 (red) angstroms and may be perceived by the normal unaided human eye.
Electromagnetic radiation of any wavelength.