define glassy
â¢ GLASSY (adjective) The adjective GLASSY has 3 senses: 1. resembling glass in smoothness and shininess and slickness. 2. (used of eyes) lacking liveliness. 3. (of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it. Familiarity information: GLASSY used as an adjective is uncommon.