[in.sid.er] n (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
INSIDER
Meaning of INSIDER in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012