Screensaver vs. Wallpaper

Screensaver and Wallpaper Definitions
Screensaver
(software) A computer program that displays aesthetic patterns or images when the computer is not being used, originally intended to prevent screenburn.
I configured my screensaver to appear after only two minutes, because I enjoyed watching it so much.
Wallpaper
Paper often colored and printed with designs and pasted to a wall as a decorative covering.
Screensaver
(proscribed) The background picture of a computer, smartphone, or similar mobile device.
Wallpaper
A picture or design displayed on the background of a computer screen or cellphone.
Wallpaper
To cover with wallpaper.
Wallpaper
To decorate a wall or room with wallpaper.
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Wallpaper
(uncountable) Decorative paper-like material used to cover the inner walls of buildings.
Wallpaper
(countable) A roll of such paper.
Wallpaper
(countable) A style or design of such material.
He is letting her select the wallpapers for the whole house.
Wallpaper
Anything that serves as a background or part of the surroundings.
Wallpaper
An image or tiled pattern used as the background of a computer desktop.
Wallpaper
Generic footage of a building or location that may be used in the background of a related news report.
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Wallpaper
Gaudy mass-produced stamps, typically of little or no value and only produced for sale to collectors.
Wallpaper
A radio operator's collection of awards and QSL cards.
Wallpaper
(transitive) To cover (a wall, a room, etc) with wallpaper.
Wallpaper
A decorative paper for the walls of rooms
Wallpaper
Cover with wallpaper