Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “know”

know

noun     /nəʊ/ US  /noʊ/ informal
be in the know to have knowledge about something that most people do not have: This resort is considered by those who are in the know to have the best downhill skiing in Europe.Aware
(Definition of know noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of know

Definitions of “know” in other dictionaries

Word of the Day

pump iron

to lift heavy weights for exercise

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