Source : Webster's Revised Unabridged Dictionary (1913)

Glassy \Glass"y\, a.
   1. Made of glass; vitreous; as, a glassy substance. --Bacon.

   2. Resembling glass in its properties, as in smoothness,
      brittleness, or transparency; as, a glassy stream; a
      glassy surface; the glassy deep.

   3. Dull; wanting life or fire; lackluster; -- said of the
      eyes. ``In his glassy eye.'' --Byron.

   {Glassy feldspar} (Min.), a variety of orthoclase; sanidine.

Source : WordNet®

glassy
     adj 1: resembling glass in smoothness and shininess and slickness;
            "the glassy surface of the lake"; "the pavement
            was...glassy with water"- Willa Cather
     2: used of eyes lacking liveliness; "empty eyes"; "a glassy
        stare"; "his eyes were glazed over with boredom" [syn: {glazed}]
     3: (of ceramics) having the surface made shiny and nonporous by
        fusing a vitreous solution to it; "glazed pottery";
        "glassy porcelain"; "hard vitreous china used for plumbing
        fixtures" [syn: {vitreous}, {vitrified}]
     [also: {glassiest}, {glassier}]