Plaster (noun)

1. A mixture of lime or gypsum, sand and water, used for coating walls and ceilings.
2. A medical dressing applied to a wound or sore, typically made of a soft material spread on a cloth and held in place with a bandage.

Origin:

From middle english plastre, from old french plastre, from latin plastrum ("a plaster, a poultice"), from greek πλαστός (plastós, "molded, formed").

Examples:

1. He was applying plaster to the wall.
2. The ceiling was covered with a layer of plaster.
3. The doctor applied a plaster to the cut on his finger.
4. The plaster was used to set the broken bone.
5. The plasters were used to cover the blisters on her feet.