thin disk of unleavened bread used in a religious service (especially in the celebration of the Eucharist)
a small thin crisp cake or cookie
a small adhesive disk of paste; used to seal letters
百科解释
In gastronomy, a wafer (also spelled waffer) is a crisp, often sweet, very thin, flat, and dry biscuit, often used to decorate ice cream. Wafers can also be made into cookies with cream flavoring sandwiched between them.