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English definition of “window”

window

noun [C] (OPENING)   /ˈwɪn·doʊ/
an opening in the wall of a building or vehicle , usually covered with glass , to let light and air in and to allow people inside to see out: to open / close a window From her bedroom window she could see a lovely garden . In a store , a window is the large glass-covered front behind which goods for sale are usually shown : We walked along Fifth Avenue , looking in the shop windows. A window is also a period when there is an unusual opportunity to do something: If a window of opportunity presents itself, I’d be a fool not to take advantage of it.
(Definition of window noun (OPENING) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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