Entry 2 senses · 2 variants Webster, 1913 Emplastic · Em·plas·tic · IPA a. n. 01 a. Fit to be applied as a plaster; glutinous; adhesive; as, emplastic applications. 1. Fit to be applied as a plaster; glutinous; adhesive; as, emplastic applications. 02 n. A medicine causing constipation. 1. A medicine causing constipation.