n. 1 a stone placed at the corner joining two masonry walls; 2 something basic and indispensable; foundation.
The cornerstone of democratic government is a free press. OR The cornerstone of the building was made of cobblestone.
The cornerstone of democratic government is a free press. OR The cornerstone of the building was made of cobblestone.
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The cornerstone of the building was made of cobblestone.
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essential; fundamental; backbone
inessential
3 syllables
cor-ner-stone
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