cornerstone

B2
Noun
3 definition(s)
1 Definition

A stone forming the base at the corner of a building.

2 Definition

Such a stone used ceremonially, often inscribed with the architect's and owner's names, dates and other details.

Example Sentences
  • The cornerstone on the Flatiron Building is set on the Fifth Avenue facade.
3 Definition

That which is prominent, fundamental, noteworthy, or central.

Example Sentences
  • Exceptional service is the cornerstone of the hospitality industry.