Entry 3 senses Webster, 1913 Plastering · Plas·ter·ing · IPA /plˈæstərɪŋ/ 01 n. Same as Plaster, n., 2. 1. Same as Plaster, n., 2. See: Plaster 2. The act or process of overlaying with plaster. 3. A covering of plaster; plasterwork.