Wa·fer n.
 1. Cookery A thin cake made of flour and other ingredients.
    Wafers piping hot out of the gleed.   --Chaucer.
    The curious work in pastry, the fine cakes, wafers, and marchpanes.   --Holland.
    A woman's oaths are wafers -- break with making   --B. Jonson.
 2. Eccl. 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.
 3. An adhesive disk of dried paste, made of flour, gelatin, isinglass, or the like, and coloring matter, -- used in sealing letters and other documents.
 Wafer cake, a sweet, thin cake. --Shak.
 Wafer irons, or Wafer tongs Cookery, a pincher-shaped contrivance, having flat plates, or blades, between which wafers are baked.
 Wafer woman, a woman who sold wafer cakes; also, one employed in amorous intrigues.  --Beau. & Fl.