plaster

a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings

any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs

a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.

a surface of hardened plaster (as on a wall or ceiling); "there were cracks in the plaster"

adhesive tape used in dressing wounds

apply a heavy coat to

cover conspicuously or thickly, as by pasting something on; "The demonstrators plastered the hallways with posters"; "She let the walls of the apartment be beplastered with stucco"

affix conspicuously; "She plastered warnings all over the wall"

apply a plaster cast to; "plaster the broken arm"

coat with plaster; "daub the wall"

dress by covering with a therapeutic substance