Definitions for: Cornerstone

[n] a stone at the outer corner of two intersecting masonry walls
[n] a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies
[n] the fundamental assumptions underlying an explanation; "the whole argument rested on a basis of conjecture"

Synonyms: base, basis, foundation, fundament, groundwork

See Also: assumption, building, edifice, explanation, stone, supposal, supposition

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