a single sheet of glass in a window a pane of glass a windowpane Word Origin late Middle English (originally denoting a piece of something, such as a fence or strip of cloth): from Old French pan, from Latin pannus
‘piece of cloth’.Extra examples Her face was pressed against the pane. The burglars got in by breaking a pane of glass in a door. The missing pane has been replaced. The rain ran down the window pane. The wind blew in a pane of their front window. There was dirt on the pane.