- noun a piece of software that, after a pre-determined period of user inactivity, replaces the existing image on screen and displays moving objects to protect against screen burn
- An image, sequence of images, text, or just a blank screen which is presented on a computer monitor after a given time of user inactivity. The images and time before screen saver activation are programmable, and any activity, such as a mouse movement or keystroke, restores the screen to its former image. Currently, most monitors are not susceptible to burn-in, so screen savers usually serve to display decorative or entertaining graphics. A screen saver may be programmed to require a password before restoring the previous screen, which serves as a security measure when desired.