Meaning – An action that triggers the closing of a window, irrespective of the contents that are running on is, is called ‘close’.
In the GUI based operating systems, the close operation is found alongside the minimise and expand buttons on the top right or top left hand side of any task window (Depending on your OS). The process can be triggered by hovering over the close button for the window, and clicking on it using the mouse pointer.
If there is a task that is running, and you press the close button on that window, you will be greeted with a confirmation window, which you have to confirm, before the window can be closed.
Example of usage – “Since she did not require the browser window anymore, she decided to close it and open a another window afterwards, to avoid cluttering the screen.”