A hard, brittle, usually transparent material made by melting silica.

• By extension, any noncrystalline solid.

A drinking vessel, especially one made of glass.

• The amount it contains.

A sheet or pane used in windows, doors, or screens.

• A transparent barrier, such as rink or vehicle glass.

An optical device with lenses, such as a magnifier or telescope.

• In plural, spectacles; lenses collectively.

A mirror; looking-glass (dated).

An hourglass.

To fit with glass; to glaze.

• To enclose or encase in glass.

To view or scan with binoculars or another optical instrument.

To make smooth or shiny like glass; to become glassy.