Wafer

1. n. An adhesive disk of dried paste, made of flour, gelatin, isinglass, or the like, and coloring matter, — used in sealing letters and other documents.
2. n. A thin cake made of flour and other ingredients.
3. n. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.