The Collaborative International Dictionary of English v.0.48:

Sheen \Sheen\, v. i.
   To shine; to glisten. [Poetic]
   [1913 Webster]

         This town,
         That, sheening far, celestial seems to be. --Byron.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sheen \Sheen\, n.
   Brightness; splendor; glitter. "Throned in celestial sheen."
   --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sheen \Sheen\, a. [OE. sehene, AS. sci['e]ne, sc?ne, sc?ne,
   splendid, beautiful; akin to OFries. sk?ne, sk?ne, OS. sc?ni,
   D. schoon, G. sch["o]n, OHG. sc?ni, Goth, skanus, and E.
   shew; the original meaning being probably, visible, worth
   seeing. It is not akin to E. shine. See Shew, v. t.]
   Bright; glittering; radiant; fair; showy; sheeny. [R., except
   in poetry.]
   [1913 Webster]

         This holy maiden, that is so bright and sheen.
                                                  --Chaucer.
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         Up rose each warrier bold and brave,
         Glistening in filed steel and armor sheen. --Fairfax.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sheen
    n 1: the visual property of something that shines with reflected
         light [syn: shininess, sheen, luster, lustre]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "sheen":
   afterglow, air glow, brightness, burnish, candescence, dazzle,
   finish, flush, glaze, gleam, glimmer, glint, gloss, glow,
   incandescence, luster, polish, radiance, shimmer, shine, shininess,
   shining light, skylight, sunset glow