insider

noun

in·​sid·​er (ˌ)in-ˈsī-dər 

ˈin-ˌsī-

: a person recognized or accepted as a member of a group, category, or organization: such as

a

: a person who is in a position of power or has access to confidential information

b

: a person (such 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

Examples of insider in a Sentence

Political insiders say that she is planning to run for president.

The book gives fans an insider's view of Hollywood.

Recent Examples on the Web

Two sessions later, the Club double upgraded Eli Lilly shares to a buy-equivalent 1 rating after CEO David Ricks and other company insiders bought a significant amount of the slumping stock. —Morgan Chittum, CNBC, 16 Aug. 2025

Two baseball insiders had drastically different answers to that question on Friday. —Jackson Roberts, MSNBC Newsweek, 15 Aug. 2025

Our Lions insiders Dave Birkett and Rainer Sabin have the insight, with veteran Rock Ya-Sin making a natural transition to safety, Jameson Williams hauling down a highlight catch and rookie OG Tate Ratledge already looking like a starter. —Christian Romo, Freep.com, 15 Aug. 2025

The antecedent one insider provides: When camcorders first emerged in the early 1980s, studios responded to new piracy threats by slapping on disclaimers warning of criminal prosecution if users went to the theater to videotape their movies. —Chris Lee, Vulture, 15 Aug. 2025

Word History

First Known Use

1848, in the meaning defined above

Phrases Containing insider

• insider trading

Rhymes for insider

• collider
• confider
• divider
• outsider
• provider
• cider
• cyder
• eider
• glider
• hider
• rider
• schneider

Kids Definition

insider

noun

in·​sid·​er (ˈ)in-ˈsīd-ər 

: a person who is a member of a special group or organization

Legal Definition

insider

noun

in·​sid·​er

: a person who is in a position of power or has access to confidential information: as

a

: one (as an officer, director, employee, relative, or owner of more than 10% of the corporation's stock) who is in a position to have special knowledge of the affairs of or to influence the decisions of a company

b

: an individual (as a relative or an influential party) or entity (as a corporate affiliate) having a close relationship with a debtor such that transactions are not made at arm's length and are subject to closer scrutiny than the transactions of those dealing at arm's length