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
The Flint Hills Family Festival has become a cornerstone summer event, providing millions of kids and families of all backgrounds a chance to come together to experience the arts for free.
—
Dan Stoltz, Twin Cities, 19 Sep. 2025
The examination of the influences has turned into a cultural cornerstone.
—Chase Hunter, Mercury News, 19 Sep. 2025
Not discussed as a cornerstone of a defense that features Verse and Kobie Turner.
—Adam Grosbard, Oc Register, 19 Sep. 2025
The dish, a traditional cornerstone of Mexican cuisine that dates back over a thousand years, is a corn wrapping, called masa, filled with meats, vegetables and cheese, rolled then steamed or boiled in a corn husk.
—Kansas City Star, 19 Sep. 2025
See All Example Sentences for cornerstone
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Dan Stoltz, Twin Cities, 19 Sep. 2025
The examination of the influences has turned into a cultural cornerstone.
—Chase Hunter, Mercury News, 19 Sep. 2025
Not discussed as a cornerstone of a defense that features Verse and Kobie Turner.
—Adam Grosbard, Oc Register, 19 Sep. 2025
The dish, a traditional cornerstone of Mexican cuisine that dates back over a thousand years, is a corn wrapping, called masa, filled with meats, vegetables and cheese, rolled then steamed or boiled in a corn husk.
—Kansas City Star, 19 Sep. 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 26 Sep. 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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