insider

[ in-sahy-der ]
/ ˌɪnˈsaɪ dər /

noun

a person who is a member of a group, organization, society, etc.
a person belonging to a limited circle of persons who understand the actual facts in a situation or share private knowledge: Insiders knew that the president would veto the bill.
a person who has some special advantage or influence.
a person in possession of corporate information not generally available to the public, as a director, an accountant, or other officer or employee of a corporation.

Origin of insider

First recorded in 1820–30; inside + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for insider

British Dictionary definitions for insider

insider

/ (ˌɪnˈsaɪdə) /

noun

a member of a specified group
a person with access to exclusive information
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012