paper that is pasted in vertical strips over the walls of a room to provide a decorative surface:a roll of wallpaper [count noun]:an exclusive range of fabrics and wallpapers
something, especially music, that provides a bland or unvaried background:soothing sonic wallpaper
an optional background pattern or picture serving as a background on a computer or mobile phone screen.
apply wallpaper to (a wall or room):we were wallpapering a wall (as noun wallpapering)he was planning to do some wallpapering this month (as adjective wallpapered)the wallpapered wall behind the stairs
wallpaper in other Oxford dictionaries
Definition of wallpaper in the US English dictionary