Definition cornerstone in British English

cornerstone noun

[countable] noun

/ˈkɔː(r)nə(r)ˌstəʊn/

the basic part of something, on which everything depends

Example

Trust is the cornerstone of their marriage.

Synonyms and related words

feature priority element

Explore Thesaurus

the stone at one of the bottom corners of a new building, often put there during a special ceremony

Synonyms and related words

addition alcove balcony

Explore Thesaurus