Definition of "glow" []

• To shine brightly and steadily, especially without a flame: Embers glowed in the furnace. (verb-intransitive)
• To have a bright, warm, usually reddish color: The children's cheeks glowed from the cold. (verb-intransitive)
• To flush; blush. (verb-intransitive)
• To be exuberant or radiant: parents glowing with pride. (verb-intransitive)
• A light produced by a body heated to luminosity; incandescence. (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.

• "Professor Shairp defined the soul of poetry when he wrote: "Whenever the soul comes vividly in contact with any fact, truth, or existence, which it realizes and takes home to itself with more than common intensity, out of that meeting of the soul and its object there arises a thrill of joy, a glow of emotion; and the expression of that _glow_, that _thrill_, is poetry.""
• "It is curious to observe the relation _of glow, brush_, and _spark_ to each other, as produced by positive or negative surfaces; thus, beginning with spark discharge, it passes into brush much sooner when the surface at which the discharge commences (1484.) is negative, than it does when positive; but proceeding onwards in the order of change, we find that the positive brush passes into _glow_ long before the negative brush does."
• "I have no doubt that if, as many believe, the aurora borealis is produced by sudden cosmic disturbances, such as eruptions at the sun's surface, which set the electrostatic charge of the earth in an extremely rapid vibration, the red glow observed is not confined to the upper rarefied strata of the air, but the discharge traverses, by reason of its very high frequency, also the dense atmosphere in the form of a _glow_, such as we ordinarily produce in a slightly exhausted tube."