Definition of "wafer" in English

noun

1. A light, thin, flat biscuit/cookie.

2. (Christianity) A thin disk of consecrated unleavened bread used in communion.

3. A soft disk originally made of flour, and later of gelatin or a similar substance, used to seal letters, attach papers etc.

4. (electronics) A thin disk of silicon or other semiconductor on which an electronic circuit is produced.

verb

1. (transitive) To seal or fasten with a wafer.

   • [M]y Father, who knew he was well, wafered the paragraph upon a sheet of paper, and sent to his Lodgings.