Definition of: plaster

(plas′tər, pläs′-) noun
1. A composition of lime, sand, and water for coating walls and partitions.
2. Calcined gypsum for making sculptor's casts, etc.; plaster of Paris.
3. A viscid substance spread on linen, silk, etc., and applied to some part of the body: used for healing purposes.
—v.t.
1. To cover or overlay with or as with plaster.
2. To apply a plaster to, as a boil or part of the body.
3. To apply like plaster or a plaster: to plaster posters on a fence.
4. To cause to adhere or lay flat like plaster.
5. Slang To strike with great force or effect. [OE <LL plastrum <L emplastrum <Gk. emplastron, emplaston <en- on + plassein daub, mold; defs. 1, 2, and 4 reborrowed in ME from cognate OF plastre]
—plas′ter·er noun
—plas′ter·ing noun