Noun

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 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.
4. A surface of hardened plaster (as on a wall or ceiling)
5. Adhesive tape used in dressing wounds

Verb

1. Apply a heavy coat to
2. Cover conspicuously or thickly, as by pasting something on
3. Affix conspicuously
4. Apply a plaster cast to
5. Coat with plaster
6. Dress by covering with a therapeutic substance