Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “insider”

insider

noun [C]     /ɪnˈsaɪdər/
WORKPLACE someone who is part of a group, or who works for a company or an organization and therefore has special knowledge or influence: She has an insider's view of the often brutal nature of trading in the stock market. an industry insider
WORKPLACE, FINANCE someone who is in a high position in a company, or someone who owns ten or more percent of shares in a company: a company insider This form needs to be filled out by any newly appointed corporate insider.
(Definition of insider noun from the Cambridge Business English Dictionary © Cambridge University Press)
Focus on the pronunciation of insider

Definitions of “insider” in other dictionaries

Word of the Day

beneficiary

a person or group who receives money, advantages, etc. as a result of something else

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