The Collaborative International Dictionary of English v.0.48:

Glow \Glow\ (gl[=o]), v. i. [imp. & p. p. Glowed (gl[=o]d); p.
   pr. & vb. n. Glowing.] [AS. gl[=o]wan; akin to D. gloeijen,
   OHG. gluoen, G. gl["u]hen, Icel. gl[=o]a, Dan. gloende
   glowing. [root]94. Cf. Gloom.]
   [1913 Webster]
   1. To shine with an intense or white heat; to give forth
      vivid light and heat; to be incandescent.
      [1913 Webster]

            Glows in the stars, and blossoms in the trees.
                                                  --Pope.
      [1913 Webster]

   2. To exhibit a strong, bright color; to be brilliant, as if
      with heat; to be bright or red with heat or animation,
      with blushes, etc.
      [1913 Webster]

            Clad in a gown that glows with Tyrian rays.
                                                  --Dryden.
      [1913 Webster]

            And glow with shame of your proceedings. --Shak.
      [1913 Webster]

   3. To feel hot; to have a burning sensation, as of the skin,
      from friction, exercise, etc.; to burn.
      [1913 Webster]

            Did not his temples glow
            In the same sultry winds and acrching heats?
                                                  --Addison.
      [1913 Webster]

            The cord slides swiftly through his glowing hands.
                                                  --Gay.
      [1913 Webster]

   4. To feel the heat of passion; to be animated, as by intense
      love, zeal, anger, etc.; to rage, as passior; as, the
      heart glows with love, zeal, or patriotism.
      [1913 Webster]

            With pride it mounts, and with revenge it glows.
                                                  --Dryden.
      [1913 Webster]

            Burns with one love, with one resentment glows.
                                                  --Pope.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

glowing \glowing\ adj.
   1. softly bright or radiant.

   Syn: aglow(predicate), lambent, luminous, lucent.
        [WordNet 1.5]

   2. highly enthusiastic; as, glowing praise.
      [WordNet 1.5]

   3. brilliantly colored and apparently giving off light.

   Syn: fluorescent.
        [WordNet 1.5]

   4. afire; as, glowing embers. [prenominal]

   Syn: burning.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

glowing
    adj 1: highly enthusiastic; "glowing praise"
    n 1: the amount of electromagnetic radiation leaving or arriving
         at a point on a surface [syn: radiance, glow,
         glowing]