appwindow
nounUK /ˈæpˌwɪndəʊ/
US /ˈæpˌwɪndoʊ/
A box on a computer screen that shows one app you are using.
I closed the appwindow so I could see my game again.
OTHER MEANINGS
2. A small floating panel that holds an app's controls.
The music appwindow stayed on top while I typed.
3. A separate viewing area opened by a mobile app on a tablet.
The drawing appwindow split the screen in two.
4. The visible frame that contains an app's menus and buttons.
Drag the appwindow to the side to make it bigger.