A "poster" is a type of picture or text that is printed on a large piece of paper or other material. It is usually displayed on a wall or notice board to provide information, advertise something, or decorate a space. Full definition
A set of posters for the royal wedding to create a display in your classroom. (tes.com)
Smart security cameras are the new poster child for smart homes, now that smart lighting has more or less become normal. (slashgear.com)
The companies, a spokesman said, are planning either to send out the pictures in their monthly customer bills or to display them on posters on repair trucks and in their offices. (edweek.org)