Read the dictionary definition of glassy. All definitions for this word.
1. (used of eyes) lacking liveliness
1. empty eyes
2. a glassy stare
3. his eyes were glazed over with boredom
2. (of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it
1. glazed pottery
2. glassy porcelain
3. hard vitreous china used for plumbing fixtures
3. resembling glass in smoothness and shininess and slickness
1. the glassy surface of the lake
2. the pavement was...glassy with water