wafer

n. a very thin, light, and crisp biscuit that is often eaten with ice cream.

n. a thin, crisp, often sweet biscuit or cookie, frequently used as a garnish for desserts.

“The waiter served the chocolate mousse with a vanilla wafer on top.”

“The pastry chef layered delicate lemon wafers between clouds of whipped cream to create a light summer dessert.”

n. a thin slice of material, like silicon, used to make computer chips.

n. a thin slice of semiconductor material, such as silicon, used in the fabrication of integrated circuits.

“Engineers can fit hundreds of tiny processors onto a single silicon wafer.”

“The manufacturing facility maintains a sterile environment to prevent dust from contaminating the silicon wafers during the etching process.”

Technical

n. a thin piece of bread used in some Christian church services.

n. a thin disc of unleavened bread consecrated and consumed during the Eucharist.

“The priest placed a small white wafer in the hands of each person.”

“During the liturgy, the distribution of the sacred wafers followed a strictly traditional sequence of prayers.”

Formal

n. a small, sticky disc used in the past to close letters or attach papers.

n. a small disc of dried paste or gelatin used as an adhesive seal for documents.

“He closed the old envelope with a red wafer before sending it.”

“The historian noted that the 18th-century correspondence was still secured by its original wax and paper wafers.”

Archaic