noun
plural -dows
[count] an opening in a wall, door, etc., that usually contains a sheet of glass
a sheet of glass that covers an opening in a building, vehicle, etc.
a large window at the front of a store where goods are displayed so that they can be seen by people who are walking past
an opening in a wall through which business is conducted
[count] :a part of something that you can see through
[count] :an area or box on a computer screen that shows a program that is currently running
[singular] :a period of time during which something can happen
a window into/on
something that makes it possible to see or understand something clearly
go out the window
informal :to stop being used or thought about
throw (something) out the window
informal :to stop using or thinking about (something)