›ITone of the separate areas that can be opened and moved around on a computer screen to use particular programs: The information appeared in a new window.click on/close/open a windowmaximize/minimize/move a windowenlarge/reduce a window → Comparetabnoun
›a short period in between other activities when there is an opportunity to do something: I have a window on Thursday morning, so we could meet then.The difficult economic conditions provide a window of opportunity for longterm investors.
›COMMERCEthe large area of glass at the front of a store behind which goods are displayed: Could I try on the dress in the window?Stores don't tend to put anything above a size 8 in their window displays.