Paper often colored and printed with designs and pasted to a wall as a decorative covering, uncountable Decorative paper-like material used to cover the inner walls of buildings, countable A style or design of such material or image, verb_ cover with wallpaper, transitive To cover (a wall, a room, etc) with wallpaper. intransitive verb_ To decorate a wall or room with wallpaper, To cover with wallpaper