Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “cornerstone”

cornerstone

noun [C]     /ˈkɔːnəstəʊn/
something very important that something else depends on: Freedom of speech is the cornerstone of democracy .Important and essential thingsInformation and messages
(Definition of cornerstone noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “cornerstone” in other dictionaries

Word of the Day

cookery

the skill or activity of preparing and cooking food

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More