screen saver


noun Computers.

a program that displays a constantly shifting pattern on a screen when the computer is idle, originally used to prevent damage to the screen through continuous display of the same image but now used primarily for decoration.
Also screen·sav·er [skreen-sey-ver] /ˈskrinˌseɪ vər/

British Dictionary definitions for screensaver

screensaver
/ (ˈskriːnseɪvər) /

noun

a computer program that reduces screen damage resulting from an unchanging display when a computer is switched on but not in use by blanking the screen or generating moving patterns, etc