Etymology: Middle English, from Old English, from Latin emplastrum, from Greek emplastron, from emplassein to plaster on, from en- + plassein to mold, plaster; perhaps akin to Latin planus level, flat — more at floor
Date: before 12th century
1. a medicated or protective dressing that consists of a film (as of cloth or plastic) spread with a usually medicated substance <adhesive plaster>; broadly something applied to heal and soothe 2. a pasty composition (as of lime, water, and sand) that hardens on drying and is used for coating walls, ceilings, and partitions • plastery adjective II. verb (plastered; plastering) Date: 14th century transitive verb 1. to overlay or cover with plaster ; coat 2. to apply a plaster to 3. a. to cover over or conceal as if with a coat of plaster b. to apply as a coating or incrustation c. to smooth down with a sticky or shiny substance <plastered his hair down> 4. to fasten or apply tightly to another surface 5. to treat with plaster of paris 6. to affix to or place on especially conspicuously or in quantity 7. to inflict heavy damage or loss on especially by a concentrated or unremitting attack intransitive verb to apply plaster • plasterer noun
New Collegiate Dictionary. 2001.