program window
nounUK /ˈprəʊ.ɡræm ˈwɪn.dəʊ/
US /ˈproʊ.ɡræm ˈwɪn.doʊ/
A program window is the box on a computer screen where you see and use a program.
I clicked the X to close the program window.
OTHER MEANINGS
2. A framed area on a screen that shows a document or file opened by a program.
The text editor opened a new program window for my story.
3. A separate viewing area created by a running application on a graphical display.
She moved the program window to the side so she could see both at once.
4. The main display panel of a software application, containing menus and tools.
The program window has a menu bar at the top.