Definition cornerstone in American English

cornerstone noun

[countable] noun

/ˈkɔrnərˌstoʊn/

the basic part of something, on which everything depends

Example

Trust is the cornerstone of their marriage.

Synonyms and related words

feature priority element

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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

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