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

Meat, canola oil, and, uh, biscuits and wafers account for most of the U.S. imports from Canada, but 20 percent of this country’s fresh-vegetable imports come from there, too. —Yasmin Tayag, The Atlantic, 8 Feb. 2025

Engineers can bond gallium arsenide dies or small wafers to silicon waveguides, then build the lasers on top, a process that requires specialized equipment and results in material waste. —IEEE Spectrum, 4 Feb. 2025

Verb

Germanium substrates wafers at a Umicore facility in Olen, Belgium. —Maddie Stone, WIRED, 15 Feb. 2025

Stir in vanilla wafers with a silicone spatula in two additions, alternating with milk, mixing just until combined. —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