\ ˈpēn How to pronounce peen (audio) \
peened; peening; peens

Definition of peen

 (Entry 1 of 2)

transitive verb

: to draw, bend, or flatten by or as if by hammering with a peen



Definition of peen (Entry 2 of 2)

: a usually hemispherical or wedge-shaped end of the head of a hammer that is opposite the face and is used especially for bending, shaping, or cutting the material struck

Examples of peen in a Sentence

Recent Examples on the Web: Noun The two heads of this hammer (a flat head and a round head, known as the pein or peen) are stronger than a claw hammer to withstand and shape metal surfaces. Popular Science, "Essential hammers for your toolbox," 15 Mar. 2020 Fold forming is a process in which the metal is heated and then is bent into designs by creasing it with a ball peen hammer. Lyndi Mcnulty,, "An Eye for Art: Finksburg artist runs gamut from designing clothes and jewelry to painting murals and watercolors," 6 Nov. 2019 This is not a show content to use a ball peen hammer for precision chiseling when a sledgehammer is available to reduce points to a fine powder. Daniel Fienberg, The Hollywood Reporter, "Critic's Notebook: 'Billions' Caps a Much-Improved Season 2," 9 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'peen.' 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 peen


circa 1522, in the meaning defined above


1683, in the meaning defined above

History and Etymology for peen


probably of Scandinavian origin; akin to Norwegian penn peen

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Time Traveler for peen

Time Traveler

The first known use of peen was circa 1522

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Cite this Entry

“Peen.” Dictionary, Merriam-Webster, Accessed 21 Sep. 2020.

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