Definition of "light" []

• Physics 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. (noun)
• Physics Electromagnetic radiation of any wavelength. (noun)
• The sensation of perceiving light; brightness: a sudden light that made me blink. (noun)
• A source of light, especially a lamp, a lantern, or an electric lighting fixture: Turn out the lights when you leave. (noun)
• The illumination derived from a source of light: by the light of the moon. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A change in the direction of a small portion of the sun's light passing by the solid body of the moon, it being deflected outward by repulsion or reflection from its surface, and other portions being deflected inward after passing the body by mutual repulsion of its own elements toward a _light vacuum_ or space devoid of the element of vibration."
• "We also hold these lights in our hands to honor Christ, and to acknowledge him as the _true light_, [5] whom they represent under this character, and who is called by holy Simeon in this mystery, _a light for the enlightening of the"
• "_Delight_ is naturally formed by the participle _de_ and _light_, to make light, in the same way as "debase," to make base, "defile," to make foul."