Hypertext Webster Gateway: "cornerstone"
From WordNet (r) 1.7 (wn)
cornerstone
n 1: the fundamental assumptions underlying an explanation; "the
whole argument rested on a basis of conjecture" [syn: {basis},
{base}, {foundation}, {fundament}, {groundwork}]
2: a stone in the exterior of a large and important building;
usually carved with a date and laid with appropriate
ceremonies
3: a stone at the outer corner of two intersecting masonry
walls
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