a hard, brittle substance, typically transparent or translucent, made by fusing sand with soda and lime and cooling rapidly. It is used to make windows, drinking containers, and other articles

the screen is made from glass

a glass door

a drinking container made from glass

a beer glass

a lens, or an optical instrument containing a lens or lenses, in particular a monocle or a magnifying lens

a mirror

she couldn't wait to put the dress on and look in the glass

cover or enclose with glass

the inn has a long gallery, now glassed in

(especially in hunting) scan (one's surroundings) with binoculars

the first day was spent glassing the rolling hills

hit (someone) in the face with a beer glass

he glassed the landlord because he'd been chatting to Jo

reflect as if in a mirror

the opposite slopes glassed themselves in the deep dark water