Definition of pane noun from the Oxford Advanced Learner's Dictionary

 

pane

 noun
noun
BrE BrE//peɪn//
 
; NAmE NAmE//peɪn//
 
 
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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.
See the Oxford Advanced American Dictionary entry: pane