1. A road-surfacing material composed of asphalt and crushed glass.
2. A blend of glass and asphalt.

• Glass: A hard, usually transparent substance that shatters easily composed of sand melted in combination with other oxides; such as, lime or soda and used as windows, bottles, lenses, etc.
• Asphalt: A paving material composed mainly of asphalt and gravel that hardens on cooling and is used for making hard surfaces for roads, parking lots, sidewalks, etc.