: a ring (as of synthetic rubber) used as a gasket

Examples of O-ring in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Overwhelmed by the realization that NASA had not revealed the O-ring issue to astronauts, chief astronaut John Young sent a memo to the entire astronaut corps expressing his outrage. Alice George, Smithsonian Magazine, 18 July 2025 One of the biggest upgrades to the 2.0 model is a removable silicone O-ring which sits in a groove around the perimeter of the inner ring. Ben Coxworth july 09, New Atlas, 9 July 2025 And the O-ring detail on the straps gives it a little flair for style. Olivia Young, Travel + Leisure, 30 June 2025 Joints between the cylindrical sections of the rockets had a design flaw that, in the event of an O-ring failure, could result in the loss of the shuttle and its crew. Trip Gabriel, New York Times, 21 Feb. 2025 See All Example Sentences for O-ring

Word History

First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of O-ring was in 1946

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Cite this Entry

“O-ring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/O-ring. Accessed 27 Jul. 2025.

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