°The natural medium emanating from the sun and other very hot sources (now recognised as electromagnetic radiation with a wavelength of 400-750 nm), within which vision is possible.
°A source of illumination.
adjective
°having light.
synonyms:
ignite, kindle, conflagrate, illuminate
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, light up, visible light, bright, pale, white, milk, cream, lightweight, delicate, gentle, soft, lite, lo-cal, low-alcohol, inconsequential, trivial, unimportant, chance upon, come upon, find, happen upon, hit upon, alight, land