Plaster  —n. 1 soft mixture of lime, sand, and water etc. Applied to walls, ceilings, etc., to dry into a smooth hard surface. 2  = *sticking-plaster. 3 = *plaster of paris. —v. 1 cover (a wall etc.) With plaster. 2 coat, daub, cover thickly. 3 stick or apply (a thing) thickly like plaster. 4 (often foll. By down) smooth (esp. Hair) with water etc. 5 (as plastered adj.) Slang drunk.  plasterer n.  [greek emplastron]