noun

1. a pasty mixture, as of lime or gypsum, sand, and water, which hardens on drying, for coating walls, ceilings, and partitions
2. plaster of Paris
3. a pasty preparation spread on cloth and applied to the body, used medicinally as a curative or counterirritant

Etymology: ME < OE plaster & OFr plastre, both < LL plastrum, for L emplastrum < Gr emplastron, plaster < emplassein, to daub over < en, on, in + plassein, to form: see plastic

transitive verb

1. to cover, smear, overlay, etc. with or as with plaster
2. to apply or affix like a plaster to plaster posters on walls
3. to make lie smooth and flat
4. to apply plaster of Paris as a treatment
5. Informal to affect or strike with force