# CORNERSTONE

## Definition:

1. [noun] the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture"
Synonyms: basis, base, foundation, fundament, groundwork

2. [noun] a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies

3. [noun] a stone at the outer corner of two intersecting masonry walls

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