insider

Definitions

A person who is a member of a particular group, organization, or society and has special knowledge or influence.

A person who has access to confidential information, especially regarding a company's financial affairs.

Examples

The investigation revealed that the security breach was caused by an insider with access to the company's private servers.

As an industry insider, she was able to provide unique insights into the future of the technology market.

Synonyms

member associate colleague confidant part of the group inner circle member

Antonyms

outsider stranger foreigner alien nonmember uninitiated person