Main Entry: in·sid·er

Pronunciation: \(ˌ)in-ˈsī-dər, ˈin-ˌ\

Function: noun

Date: 1848

: a person recognized or accepted as a member of a group, category, or organization: as a : a person who is in a position of power or has access to confidential information b : one (as an officer or director) who is in a position to have special knowledge of the affairs of or to influence the decisions of a company