cor·​ner·​stone | \ ˈkȯr-nər-ˌstōn How to pronounce cornerstone (audio) \

Definition of cornerstone

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

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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 Constitutional Convention delegate and District of Columbia commissioner Daniel Carroll, of the great Maryland Catholic family, was a Mason, instrumental in the cornerstone-laying ceremony at the new Capitol. Priscilla Montgomery Jensen, WSJ, 1 May 2022 And yet the company's regulatory travails and lackluster financial results have tested the resolve of even cornerstone Alibaba investors like Masayoshi Son's SoftBank Group, which holds a 25% stake in the e-commerce giant. Clay Chandler, Fortune, 14 Apr. 2022 The event marked 12 years and 13 days from the time Obama's cornerstone legislative achievement was signed into law. Kevin Liptak, CNN, 9 Apr. 2022 Bryant and the Rockies finalized their $182 million, seven-year contract on Friday, giving the franchise a cornerstone bat to compete in the loaded NL West. David Brandt,, 18 Mar. 2022 Prior to joining the Buccaneers, Brady played 20 seasons with the New England Patriots, serving as the franchise’s cornerstone across two decades. J. Kim Murphy, Variety, 13 Mar. 2022 Each month centers on a different region, cuisine style, or cultural cornerstone. Louryn Strampe, Wired, 28 Nov. 2021 The cornerstone of Temple Emanu-El was laid in 1891, a time when hundreds of Jews still flocked to the Reform synagogue to celebrate holidays. Shira Hanau,, 22 Nov. 2021 Earlier Thursday, Comcast said its broadband unit, the cornerstone of its business, added 262,000 new customers, down 43% from the same period last year. Lillian Rizzo, WSJ, 28 Apr. 2022 See More

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

13th century, in the meaning defined at sense 1

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Time Traveler for cornerstone

Time Traveler

The first known use of cornerstone was in the 13th century

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Dictionary Entries Near cornerstone

corner quad


corner tree

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Statistics for cornerstone

Last Updated

14 May 2022

Cite this Entry

“Cornerstone.” Dictionary, Merriam-Webster, Accessed 26 May. 2022.

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More from Merriam-Webster on cornerstone

Nglish: Translation of cornerstone for Spanish Speakers

Britannica English: Translation of cornerstone for Arabic Speakers Encyclopedia article about cornerstone


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