Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “inside”


adjective     /ˌɪnˈsaɪd/
B2 [always before noun] in or on the part of something under its surface: Put your wallet in the inside pocket of your jacket.In and at
inside information/knowledge, etc information that is only known by people who are part of an organization, group, etc: I needed someone with inside knowledge to back up my story.Information and messagesSecrecy and privacy
(Definition of inside adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “inside” in other dictionaries

Word of the Day


When a boat or a ship sails, it travels on the water.

Word of the Day


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