per·​fo·​ra·​tion | \ ˌpər-fə-ˈrā-shən How to pronounce perforation (audio) \

Definition of perforation

1 : the act or process of perforating
2a : a hole or pattern made by or as if by piercing or boring
b : one of the series of holes (as between rows of postage stamps) in a sheet that serve as an aid in separation

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Synonyms for perforation


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Examples of perforation in a Sentence

an infection that can cause perforation of the intestine absentmindedly made perforations in his paper with his pencil
Recent Examples on the Web There could be other problems, like perforation of the esophagus, the stomach, or the bowels. Colleen Murphy,, "The Different Types of Eating Disorders—What They Are and What You Need to Know About Them," 24 Feb. 2021 The problem, of course, is that the half-sheet is now, by the definitions laid down by the new perforation paradigm, a single sheet, but most of us still accept the two half-sheets as the definition of a single sheet. Star Tribune, "Lileks: Size really does matter sometimes," 24 Jan. 2021 Open the package and remove the swab, a long Q-tip with a perforation mark halfway down its handle. Elaine Ayala,, "Ayala: San Antonio continues to line up for COVID-19 tests, in a quiet ritual repeated across the board," 12 Dec. 2020 The needles' temporary, gentle perforation of the skin enhances passage of the therapeutic agent. Elizabeth O'day, Scientific American, "Microneedles Could Enable Painless Injections and Blood Draws," 10 Nov. 2020 The county is asking Sanpete voters to sign where the perforation is on the envelope. Andy Larsen, The Salt Lake Tribune, "How many Utah mail-in ballots are being rejected, and why? Here’s the data.," 23 Oct. 2020 Instead of traditional vent openings, the E14 relies on heavy perforation in the rough shape of a city skyline to allow air to flow in and out of the laptop. Jim Salter, Ars Technica, "Sneak Preview: MSI Summit Tiger Lake-powered business laptop," 20 Oct. 2020 Roll out the crescent rolls and separate into 4 rectangles (not triangles) with a perforation in the middle of each. Beth Segal, cleveland, "Pandemic Halloween party: Turning pumpkins into jack o’ lanterns with your pod…Plus snacks," 15 Oct. 2020 Fortunately, the other side of the perforation was correctly printed with the voter’s name along with a barcode that allows the clerk’s office to look up the file signature in the database, so the ballots can still be validated. Zak Podmore, The Salt Lake Tribune, "Ballot printing error in Sanpete County creates confusion," 14 Oct. 2020

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

15th century, in the meaning defined at sense 1

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Time Traveler for perforation

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The first known use of perforation was in the 15th century

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Statistics for perforation

Last Updated

28 Feb 2021

Cite this Entry

“Perforation.” Dictionary, Merriam-Webster, Accessed 1 Mar. 2021.

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More Definitions for perforation



English Language Learners Definition of perforation

: a small hole or series of small holes in paper, cardboard, etc.
medical : a hole in part of the body caused by an accident or disease


per·​fo·​ra·​tion | \ ˌpər-fə-ˈrā-shən How to pronounce perforation (audio) \

Medical Definition of perforation

1 : the act or process of perforating specifically : the penetration of a body part through accident or disease spontaneous perforation of the sigmoid colon in the presence of diverticulosis Journal of the American Medical Association
2a : a rupture in a body part caused especially by accident or disease
b : a natural opening in an organ or body part

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