Wafer \Wa"fer\, n. [OE. wafre, OF. waufre, qaufre, F. qaufre; of Teutonic origin; cf. LG. & D. wafel, G. waffel, Dan. vaffel, Sw. v[*a]ffla; all akin to G. wabe a honeycomb, OHG. waba, being named from the resemblance to a honeycomb. G. wabe is probably akin to E. weave. See {Weave}, and cf. {Waffle}, {Gauffer}.] [1913 Webster] 1. (Cookery) A thin cake made of flour and other ingredients. [1913 Webster] Wafers piping hot out of the gleed. --Chaucer. [1913 Webster] The curious work in pastry, the fine cakes, wafers, and marchpanes. --Holland. [1913 Webster] A woman's oaths are wafers -- break with making --B. Jonson. [1913 Webster] 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. [1913 Webster] 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. [1913 Webster] 4. Any thin but rigid plate of solid material, esp. of discoidal shape; -- a term used commonly to refer to the thin slices of silicon used as starting material for the manufacture of integrated circuits. [PJC] {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. [1913 Webster]