wa·​fer | \ ˈwā-fər How to pronounce wafer (audio) \

Definition of wafer

 (Entry 1 of 2)

1a : 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
3a : 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


wafered; wafering\ ˈwā-​f(ə-​)riŋ How to pronounce wafer (audio) \

Definition of wafer (Entry 2 of 2)

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 Instead of using plastic and glass lens elements stacked over an image sensor, Metalenz's design uses a single lens built on a glass wafer that is between 1x1 to 3x3 millimeter in size. Julian Chokkattu, Wired, "A New Lens Technology Is Primed to Jump-Start Phone Cameras," 4 Feb. 2021 And even as most Republicans condemned the attack on the Capitol, support for his impeachment among them appeared to be wafer-thin. Jess Bidgood, BostonGlobe.com, "‘Boring is a good thing;’ A day in post-Trump Washington," 26 Jan. 2021 Crunched the wafer-ice on the pot-holes, Somebody wistfully twisted the bellows wheel. Michael Brendan Dougherty, National Review, "The Content of Our Christmases," 25 Dec. 2020 German silicon wafer manufacturer Siltronic, which operates a large factory on Portland’s industrial northwest waterfront, sold this week for $4.5 billion. Mike Rogoway, oregonlive, "Siltronic, with big Portland factory, sells for $4.5 billion," 10 Dec. 2020 Linzer sandwich cookies are traditionally made with ground nuts, but here, corn flour (a more finely ground relative of cornmeal) pinch-hits, creating a melt-in-your mouth, faintly sweet wafer that pairs perfectly with raspberry jam. Washington Post, "12 holiday cookie recipes to end the year on a sweeter note," 2 Dec. 2020 Take the Cornetto, which combines Vanilla ice cream with chocolate coating and hazelnut pieces in a wafer cone. CNN, "This company conquered the ice cream market. Home delivery is the final frontier," 14 Nov. 2020 Meanwhile—assuming no large increase in per-wafer manufacturing cost—the roughly one-third increase in storage density per chip could mean similarly less expensive consumer devices. Jim Salter, Ars Technica, "Micron announces new 3D NAND process—denser, faster, less expensive," 11 Nov. 2020 This adds to the cost and complexity of the manufacturing process and limits the number of lasers that can be made on one wafer. Timothy B. Lee, Ars Technica, "Lidar used to cost $75,000—here’s how Apple brought it to the iPhone," 15 Oct. 2020 Recent Examples on the Web: Verb Historic wafering iron designs indicate that, like today, the irons could be given as wedding gifts. Kat Eschner, Smithsonian, "These Beautiful Medieval Wafer Presses Are Where Waffles Come From," 29 June 2017 Historic wafering iron designs indicate that, like today, the irons could be given as wedding gifts. Kat Eschner, Smithsonian, "These Beautiful Medieval Wafer Presses Are Where Waffles Come From," 29 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'wafer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of wafer


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


1748, in the meaning defined at sense 1

History and Etymology for wafer


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

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Time Traveler for wafer

Time Traveler

The first known use of wafer was in the 14th century

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Last Updated

13 Feb 2021

Cite this Entry

“Wafer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wafer. Accessed 24 Feb. 2021.

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More Definitions for wafer



English Language Learners Definition of wafer

: a thin, crisp cracker
: a round, thin piece of bread eaten during the Christian Communion ceremony
: a small, round, thin object


wa·​fer | \ ˈwā-fər How to pronounce wafer (audio) \

Kids Definition of wafer

: a thin crisp cake or cracker


wa·​fer | \ ˈwā-fər How to pronounce wafer (audio) \

Medical Definition of wafer

: cachet

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More from Merriam-Webster on wafer

Nglish: Translation of wafer for Spanish Speakers

Britannica English: Translation of wafer for Arabic Speakers

Britannica.com: Encyclopedia article about wafer

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