A glazier's sheet is a thin sheet of glass used in construction and other applications. It is typically cut to size and then installed in windows, doors, and other openings. The term 'glazier's sheet' can also refer to the material itself, which is usually made of tempered glass. The crossword solution for the term 'glazier's sheet' is 'PANE, ' which is a four-letter word meaning a single sheet of glass.