The Collaborative International Dictionary of English v.0.48:

Gleam \Gleam\, v. t. [imp. & p. p. Gleamed; p. pr. & vb. n.
   Gleaming.]
   1. To shoot, or dart, as rays of light; as, at the dawn,
      light gleams in the east.
      [1913 Webster]

   2. To shine; to cast light; to glitter.

   Syn: To Gleam, Glimmer, Glitter.

   Usage: To gleam denotes a faint but distinct emission of
          light. To glimmer describes an indistinct and unsteady
          giving of light. To glitter imports a brightness that
          is intense, but varying. The morning light gleams upon
          the earth; a distant taper glimmers through the mist;
          a dewdrop glitters in the sun. See Flash.
          [1913 Webster]

WordNet (r) 3.0 (2006):

gleaming
    adj 1: bright with a steady but subdued shining; "from the plane
           we saw the city below agleam with lights"; "the gleaming
           brass on the altar"; "Nereids beneath the nitid moon"
           [syn: agleam, gleaming, nitid]
    n 1: a flash of light (especially reflected light) [syn:
         gleam, gleaming, glimmer]
    2: an appearance of reflected light [syn: gleam, gleaming,
       glow, lambency]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "gleaming":
   aglow, beaming, beamy, blushing, bright and sunny, buffed, burning,
   burnished, candescent, finished, flushing, furbished, glace,
   glassy, glazed, gleamy, glinting, glistening, glossy, glowing,
   illuminant, incandescent, irradiative, lacquered, lamping,
   light as day, luciferous, lucific, luciform, luminant, luminative,
   luminiferous, luminificent, luminous, lustrous, orient, polished,
   radiant, rubbed, rutilant, rutilous, satiny, sheeny, shellacked,
   shining, shiny, silken, silky, sleek, slick, starbright, starlike,
   starry, streaming, suffused, sunny, sunshiny, varnished, velvety