Glass \Glass\, v. t. [imp. & p. p. {Glassed}; p. pr. & vb. n. {Glassing}.] 1. To reflect, as in a mirror; to mirror; -- used reflexively. Happy to glass themselves in such a mirror. --Motley. Where the Almighty's form glasses itself in tempests. --Byron. 2. To case in glass. [R.] --Shak. 3. To cover or furnish with glass; to glaze. --Boyle. 4. To smooth or polish anything, as leater, by rubbing it with a glass burnisher.