If a story or photograph is plastered all over the front page of a newspaper, it is given a lot of space on the page and made very noticeable. His picture was plastered all over the newspapers on the weekend. very drunk
If something is plastered to a surface, it is sticking to the surface. His hair was plastered down to his scalp by the rain
If something or someone is plastered with a sticky substance, they are covered with it. My hands, boots and trousers were plastered with mud