1 : 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.
2 : adhesive tape used in dressing wounds
3 : a surface of hardened plaster (as on a wall or ceiling)
4 : a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris)
