as in cornerstone
an immaterial thing upon which something else rests
a sense of history is the keystone to the city's draw as a tourist destination
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Recent Examples of keystone
But the Cuyahoga River combusting due to pollutants from corporate dumping was one of the keystone events in the creation of the Environmental Protection Agency.
—
Chicago Tribune, 4 May 2026
An optical-first keystone design is only one part of the projector's full optical image optimization suite.
—Paul Ridden
may 01, New Atlas, 1 May 2026
Bison are a keystone species to North American prairies.
—Fort Worth Star-Telegram, 29 Apr. 2026
Setup is effortless thanks to Intelligent Screen Adaption, which features auto-focus, auto-keystone correction, and obstacle avoidance.
—Juhi Wadia, PC Magazine, 23 Apr. 2026
See All Example Sentences for keystone
Chicago Tribune, 4 May 2026
An optical-first keystone design is only one part of the projector's full optical image optimization suite.
—Paul Ridden
may 01, New Atlas, 1 May 2026
Bison are a keystone species to North American prairies.
—Fort Worth Star-Telegram, 29 Apr. 2026
Setup is effortless thanks to Intelligent Screen Adaption, which features auto-focus, auto-keystone correction, and obstacle avoidance.
—Juhi Wadia, PC Magazine, 23 Apr. 2026
See All Example Sentences for keystone
Recent Examples of Synonyms for keystone
Noun
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The unrest is fueling fraught debates over immigration, online far-right agitation and even Northern Ireland’s open border with the Republic — a cornerstone of the peace process.—
Peter Morrison,
Los Angeles Times,
10 June 2026
-
Never forget, this place is a cultural cornerstone, extending far beyond the sterile, humming servers of the tech sector.—
Dieter Kurtenbach,
Mercury News,
10 June 2026
Noun
-
While there was movement on the bases for both starters, the game lulled until the seventh.—
Liana Handler
Follow,
Los Angeles Times,
16 June 2026
-
Chicago trailed 4-3 in the ninth inning before Pedro Ramírez hit an RBI single off Seth Halvorsen with the bases loaded and nobody out.—
ABC News,
ABC News,
16 June 2026
Noun
-
They're meant to be mixed with another product—typically, either moisturizer or foundation, depending on your preference.—
Grace McCarty,
Glamour,
11 Dec. 2025
-
The foundation started in 2019 as a single Christmas tree lighting in the 18th and Vine Historic Jazz District and now extends to serve other Kansas City communities during the holidays.—
Mara Williams,
Kansas City Star,
11 Dec. 2025
Noun
-
The weathering of bedrock depends, in part, on temperature.—
Scott K. Johnson,
ArsTechnica,
15 June 2026
-
But far from celebrating or sanctifying the throwing off of English rule, the story’s shocking ending portrays the patriots as a fiendish mob, and casts doubt on the bedrock American faith in prosperity.—
John Swansburg,
The Atlantic,
15 June 2026
Cite this Entry
“Keystone.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/keystone. Accessed 18 Jun. 2026.
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