wafer

1 of 2

noun

wa·​fer ˈwā-fər 

plural wafers

1

a

: a thin crisp cake, candy, or cracker

b

: a round thin piece of unleavened bread used in the celebration of the Eucharist

2

: an adhesive disk of dried paste with added coloring matter used as a seal

3

a

: a thin disk or ring resembling a wafer and variously used (as for a valve or diaphragm)

b

: a thin slice of semiconductor (such as silicon) used as a base for an electronic component or circuit

wafer-like

ˈwā-fər-ˌlīk 

adjective

or less commonly waferlike

wafer-like cookies

a wafer-like electronic sensor

wafer

2 of 2

verb

wafered; wafering ˈwā-f(ə-)riŋ 

transitive verb

1

: to seal, close, or fasten with a wafer

2

: to divide (something, such as a silicon rod) into wafers

Examples of wafer in a Sentence

Recent Examples on the Web

Noun

Back in the lab, Sinno returns the silicon wafer to its box and moves to another part of the room, gesturing at the various stages of the design process for chips that might—potentially very soon—help summon powerful new AIs into existence. —Billy Perrigo, Time, 2 Apr. 2025

It is produced from an upcycled silicon wafer supplied by Sigatec, a Swiss movement component maker. —Justin Fenner, Robb Report, 1 Apr. 2025

Verb

Place vanilla wafers in a large zip-top bag and gently crush with a rolling pin, breaking down any large pieces as much as possible. —Tricia Manzanero Stuedeman, Southern Living, 23 Jan. 2025

Butter brings necessary fat but also moisture to the cake, which helps incorporate the powder of vanilla wafers into the batter. —Tricia Manzanero Stuedeman, Southern Living, 23 Jan. 2025

Word History

Etymology

Noun

Middle English, from Anglo-French wafer, walfre, of Germanic origin; akin to Middle Dutch wafele waffle

First Known Use

Noun

14th century, in the meaning defined at sense 1a

Verb

1748, in the meaning defined at sense 1

Phrases Containing wafer

• wafer-thin

Rhymes for wafer

• chafer
• safer

Kids Definition

wafer

noun

wa·​fer

ˈwā-fər

1

a

: a thin crisp cake or cracker

b

: a round thin piece of bread used in the sacrament of Communion

2

: something (as a piece of candy or a computer chip) resembling a wafer especially in thin round form

Medical Definition

wafer

noun

wa·​fer ˈwā-fər 

: cachet