cornerstone
noun
cor·ner·stone
ˈkȯr-nər-ˌstōn 
1
: a stone forming a part of a corner or angle in a wall
specifically
: such a stone laid at a formal ceremony
2
: a basic element : foundation
a cornerstone of foreign policy
Examples of cornerstone in a Sentence
Officials held a ceremony to lay the cornerstone for a new library.
Trust is the cornerstone of their relationship.
Recent Examples on the Web
This has been a cornerstone moment in my career that will live forever.
—
Carly Thomas, HollywoodReporter, 20 Apr. 2025
Campbell is the best offensive lineman in the draft and will be a cornerstone player for the Patriots for the next decade, protecting Drake Maye.
5.
—Pat Leonard, New York Daily News, 19 Apr. 2025
Deterrence must therefore remain the cornerstone of Western policy, and especially European strategy, at least in the near term.
—Alexander Gabuev, Foreign Affairs, 17 Apr. 2025
Keeping the hitter off balance is the real cornerstone of Imanaga’s mechanical mastery of the art of pitching.
—Bernie Pleskoff, Forbes.com, 17 Apr. 2025
See All Example Sentences for cornerstone
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Carly Thomas, HollywoodReporter, 20 Apr. 2025
Campbell is the best offensive lineman in the draft and will be a cornerstone player for the Patriots for the next decade, protecting Drake Maye.
5.
—Pat Leonard, New York Daily News, 19 Apr. 2025
Deterrence must therefore remain the cornerstone of Western policy, and especially European strategy, at least in the near term.
—Alexander Gabuev, Foreign Affairs, 17 Apr. 2025
Keeping the hitter off balance is the real cornerstone of Imanaga’s mechanical mastery of the art of pitching.
—Bernie Pleskoff, Forbes.com, 17 Apr. 2025
See All Example Sentences for cornerstone
Cite this Entry
“Cornerstone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cornerstone. Accessed 29 Apr. 2025.
Copy CitationKids Definition
cornerstone
noun
cor·ner·stone
ˈkȯr-nər-ˌstōn
1
: a stone forming part of a corner in a wall
2
: something of basic importance
the cornerstone of our foreign policy
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