(uncountable) A paste applied to the skin for healing or cosmetic purposes.

(countable, Britain, New Zealand, Canada) A small adhesive bandage to cover a minor wound; a sticking plaster.

(uncountable) A mixture of lime or gypsum, sand, and water, sometimes with the addition of fibres, that hardens to a smooth solid and is used for coating walls and ceilings; render, stucco.

(countable) A cast made of plaster of Paris and gauze; a plaster cast.

(uncountable) Plaster of Paris.

(transitive) To cover or coat something with plaster; to render.

(transitive) To apply a plaster to.

(transitive) To smear with some viscous or liquid substance.

(transitive) To hide or cover up, as if with plaster; to cover thickly.

(transitive, figurative) To bombard heavily or overwhelmingly; to overwhelm with (weapons) fire.

(transitive, figurative) To smooth over.