cornerstone

nouns

the fundamental assumptions from which something is begun or developed or calculated or explained

"the whole argument rested on a basis of conjecture"

base, basis, cornerstone, foundation, fundament, groundwork

a stone in the exterior of a large and important building; usually carved with a date and laid with appropriate ceremonies

cornerstone

is a part of

a structure that has a roof and walls and stands more or less permanently in one place

"there was a three-story building on the corner"; "it was an imposing edifice"

is a type of (narrower)

building material consisting of a piece of rock hewn in a definite shape for a special purpose

"he wanted a special stone to mark the site"

a stone at the outer corner of two intersecting masonry walls

cornerstone

is a part of

a structure that has a roof and walls and stands more or less permanently in one place

"there was a three-story building on the corner"; "it was an imposing edifice"

is a type of (narrower)

building material consisting of a piece of rock hewn in a definite shape for a special purpose

"he wanted a special stone to mark the site"