corner stone

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also corner stone  (kôr′nər-stōn′)
a. A stone at the corner of a building uniting two intersecting walls; a quoin.
b. Such a stone when inscribed with the date of the start of the construction of the building.
2. An indispensable and fundamental basis: the cornerstone of an argument.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Here Richard laid the corner stone, with suitable gravity, amidst an assemblage of more than half the men, and all the women, within ten miles of Templeton.
Upon a corner stone in an angle of the wall, one prisoner, who seemed to have gone to execution, had cut as his last work, three letters.
This was destroyed by fire in 1543, and some of its smoke-blackened corner stones were used when, in Jacobean times, a brick country house rose upon the ruins of the feudal castle.
corner stone for four police stations in Jenin the day before.
"The convention laid the corner stone for the ties of moderation between Kuwait and Latin American and Caribbean countries," he said, adding that Kuwait would host the second conference at this level next year.
The building is a donation by the Kuwaiti Ministry of Awqaf and Islamic Affairs.The Kuwaiti minister, who is in a six-day visit to Thailand, will also lay the corner stone of His Highness the Amir Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah's youth and sport complex in the capital, Bangkok.
Development Abdul Wahab Al-Bader laid on Thursday the corner stone for an
BEIJING -- Foreign Minister Makhdoom Shah Mehmood Qureshi says Pak-China friendship is the corner stone of our foreign policy and both countries are pursuing the agenda for development and progress in the region.
Islamabad -- Foreign Minister Shah Mehmood Qureshi says Jammu and Kashmir is the corner stone of Pakistan's foreign policy and the Kashmir issue needs to be resolved under the UN Security Council's Resolutions as per aspirations of the people of occupied Kashmir.