plaster definition

1. a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings
2. 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
3. a surface of hardened plaster (as on a wall or ceiling)
• examples: there were cracks in the plaster
4. adhesive tape used in dressing wounds
5. apply a heavy coat to
6. cover conspicuously or thickly, as by pasting something on
• examples: The demonstrators plastered the hallways with posters
• examples: She let the walls of the apartment be beplastered with stucco
7. affix conspicuously
• examples: She plastered warnings all over the wall
8. apply a plaster cast to
• examples: plaster the broken arm
9. coat with plaster
• examples: daub the wall