pin·​hole | \ˈpin-ˌhōl \

Definition of pinhole 

: a small hole made by, for, or as if by a pin

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Examples of pinhole in a Sentence

The water was leaking through a pinhole in the pipe. pinholes in a bedsheet will look like stars if you shine a light from behind it

Recent Examples on the Web

In 2013, a resident of Alberta, Canada, took this pinhole camera photograph of the sun’s path throughout the year and shared it with the astronomy website EarthSky. Brian Resnick, Vox, "A brief scientific guide to the first day of spring.," 20 Sep. 2018 The two compartments would be separated by a wall with a shutter covering a pinhole just large enough for a gas molecule to pass through. Jennifer Ouellette, Ars Technica, "Penn State scientists build quantum version of Maxwell’s demon," 12 Sep. 2018 Fermilab spokeswoman Deb Sebastian said a 400-gallon tank with sulfuric acid for water treatment sprang a pinhole-sized leak Monday around 2:30 p.m. Megan Jones, Aurora Beacon-News, "No injuries reported after acid leak at Fermilab in Batavia," 10 July 2018 The camera that caught Alzahab’s eye is indeed a curiosity: 30 pounds of copper, titanium, steel, gold and other metals welded together into a box that makes pictures by admitting only a pinhole of light. Wayne Martin Belger, Smithsonian, "Pushed to the Margins, These Brave People Are Pushing Back," 27 June 2018 At one point renamed the Georgia Mae, the boat developed pinholes in its hull from tiny fires sparked by faulty wiring. Rick Montgomery, kansascity, "Tornado sunk this Kansas cruise boat in 1978, killing 16. Owners hope it floats again.," 22 June 2018 In 2013, a resident of Alberta, Canada — several hundred miles south of Fairbanks but still in a high latitude — took this pinhole camera photograph of the sun’s path throughout the year, and shared it with the astronomy website EarthSky. Brian Resnick, Vox, "The summer solstice is Thursday: 6 things to know about the longest day of the year," 19 June 2018 Figures are airtight yet textureless, with eyes like pinholes. New York Times, "Can You Illustrate Emotional Absence? These Graphic Novels Do," 31 May 2018 Officers found pinhole cameras that recorded unsuspecting customers’ typing their PIN numbers. Alana Levene,, "Brazilian couple charged for skimming people’s cards at Boston-area ATMs," 20 Apr. 2018

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

1612, in the meaning defined above

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Statistics for pinhole

Last Updated

16 Nov 2018

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Time Traveler for pinhole

The first known use of pinhole was in 1612

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More Definitions for pinhole



English Language Learners Definition of pinhole

: a very small hole made by a pin or in some other way

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More from Merriam-Webster on pinhole

Rhyming Dictionary: Words that rhyme with pinhole

Thesaurus: All synonyms and antonyms for pinhole

Britannica English: Translation of pinhole for Arabic Speakers

Comments on pinhole

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to enclose within walls

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