Definition of peen in English:


Line breaks: peen
Pronunciation: /piːn
(also pein)


The end of a hammer head opposite the face, typically wedge-shaped, curved, or spherical: [in combination]: a ball-peen hammer
More example sentences
  • The other end is a ball-shaped peen for metal working.
  • Besides the two ball peens, a one pound scaling hammer and a ten and a half pound handled sledge were offered.


[with object] Back to top  
1Strike with a hammer or the peen of a hammer: each run of weld is peened before the next run is applied
More example sentences
  • The entire massive plinth and the next solid moulding above it are left with a rough surface, dented by heavy hammers and not peened to a sheen.
  • It is important to peen the weld metal while hot to help eliminate shrinkage, warpage, and possibly cracks.
  • Short welds using a wandering sequence should be used and the weld should be peened as quickly as possible after welding.
1.1 another term for shot-peen.


early 16th century (as a verb): probably of Scandinavian origin; compare with Swedish dialect pena (ut), Danish dialect pene (ud) 'beat (out)'.

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Word of the day retroflex
Pronunciation: ˈrɛtrə(ʊ)flɛks
turned backwards