·vt To seal or close with a wafer.
II. Wafer ·noun A thin cake made of flour and other ingredients.
III. Wafer ·noun An adhesive disk of dried paste, made of flour, gelatin, isinglass, or the like, and coloring matter, — used in sealing letters and other documents.
IV. Wafer ·noun A thin cake or piece of bread (commonly unleavened, circular, and stamped with a crucifix or with the sacred monogram) used in the Eucharist, as in the Roman Catholic Church.