<p><strong>Noun</strong></p><ul><li>a hard, brittle, noncrystalline, more or less transparent substance produced by fusion, usually consisting of mutually dissolved silica and silicates that also contain soda and lime, as in the ordinary variety used for windows and bottles</li><li>any artificial or natural noncrystalline and transparent hard substance, such as fused borax, obsidian, or the like</li><li>something made of a noncrystalline and transparent hard substance, such as a windowpane</li><li>a tumbler or other comparatively tall, handleless drinking container</li><li>the quantity contained within a tumbler or other tall, handleless drinking container; a glassful: She poured two glasses of wine for herself and her guest. Drink a glass of orange juice and you'll feel better.</li><li>a tumbler or other tall, handleless drinking container with its contents: Hand me that glass of milk.</li><li>glasses: a device to compensate for impaired vision or to protect the eyes from light, dust, and the like, consisting usually of two glass or plastic lenses set in a frame that includes a nosepiece for resting on the bridge of the nose and two sidepieces extending over or around the ears</li><li>a mirror</li><li>things made of glass, collectively; glassware: They used to collect old glass.</li><li>a lens, especially one used as a magnifying glass</li><li>a spyglass</li></ul><p><strong>Adjective</strong></p><ul><li>made of glass: a glass tray</li><li>furnished or fitted with panes of glass; glazed</li></ul><p><strong>Verb</strong></p><ul><li>to fit with panes of glass</li><li>cover with or encase in glass</li><li>to coat or cover with fiberglass: to glass the hull of a boat</li><li>to scan with a spyglass or other optical instrument</li><li>to reflect: Trees glassed themselves in the lake</li></ul>