plastered adjective3 •Coated with plaster.The old home had plastered walls rather than drywall. •Covered extensively with something, especially posters, pictures, or notices.The wall was plastered with pictures. •(slang) Drunk, intoxicated.The only way he could deal with the grief following his wife's death was to get so plastered that he passed out.Every Monday morning my boss would come in plastered, with a squash about 50 pounds in size. formsmore plastered · most plastered