GL`ASS, n. [L. glastum; glesid, blueness. Greenness is usually named from vegetation or growing, as L. viridis, from vireo.] 1. A hard, brittle, transparent, factitious substance, formed by fusing sand with fixed alkalies.In chimistry, a substance or mixture, earthy, saline or metallic, brought by fusion to the state of a hard, brittle, transparent mass, whose fracture is conchoidal.2. A glass vessel of any kind; as a drinking glass.3. A mirror; a looking-glass.4. A vessel to be filled with sand for measuring time; as an hour-glass.5. The destined time of man's life. His glass is run.6. The quantity of liquor that a glass vessel contains. Drink a glass of wine with me.7. A vessel that shows the weight of the air.8. A perspective glass; as an optic glass.9. The time which a glass runs, or in which it is exhausted of sand. The seamen's watch-glass is half an hour. We say, a ship fought three glasses. 10. Glasses, in the plural, spectacles. GL`ASS, a. Made of glass; vitreous; as a glass bottle. GL`ASS, v.t. To see as in a glass. [Not used.] 1. To case in glass. [Little used.]2. To cover with glass; to glaze.[In the latter sense, glaze is generally used.]
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