cornerstone

(noun)

noun

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

Similar word(s): base, basis, foundation, fundament, groundwork

Definition categories: thought, assumption, supposal, supposition

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

Definition categories: man–made, stone

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

Definition categories: man–made, stone

Sentences with cornerstone as a noun:

- The cornerstone on the Flatiron Building is set on the Fifth Avenue facade.

- Exceptional service is the cornerstone of the hospitality industry.

- That is the cornerstone of any meaningful debate about budgets and projects, regulations and policies.