Dictionary of Business Terms: active window
active window
in Microsoft Windows, the window that currently has the focus, that is, the one in which keyboard or mouse actions will be effective. Usually the title bar of the active window will be a different color from those of other windows.
Dictionary of Computer and Internet Terms: active window
active window
the window currently in use, the one in which the user is typing, drawing, or making menu choices (see Figure 2). There can only be one active window at a time.