cornerstone   (TTS Sound)

The noun cornerstone has 3 senses

• basis, base, foundation, fundament, groundwork, cornerstone -- (the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture")


• cornerstone -- (a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies)


• cornerstone -- (a stone at the outer corner of two intersecting masonry walls)