window
/ˈwɪndəʊ/noun
An opening in a building or vehicle, usually fitted with glass panes, that lets in light and air.
Example sentences
- “She opened the window to let some fresh air into the kitchen.”
- “Rain streamed down the car window as we drove home.”
Also a limited period: 'a window of opportunity', 'a two-hour delivery window'. Computer windows extend the metaphor of looking through.