Double-click as a verb means To press down and release a button on (a pointing ... (computing) The action of pushing the button on a mouse twice in quick ... the act of selecting something on a computer click test screen by quickly pressing a button on a mouse or some other device two times A double click with the mouse will start the program.Double-click is a term used to describe the process of quickly pressing a mouse button twice while keeping it still. In most cases, a double-click is with the left mouse button and is used to open or execute a file, folder, or software program.