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

As Minecraft continues its box office domination, Hollywood insiders agree that De Luca and Abdy have bought themselves some time, but are not out of the woods yet. —Borys Kit, HollywoodReporter, 7 Apr. 2025

Related Articles As hundreds of thousands of international tastemakers from around the world get ready to descend on Milan, WWD has put together an insider guide for tackling the world’s biggest design event of the year, with more to come. —Sofia Celeste, Footwear News, 7 Apr. 2025

Inspired by Jane Mayer’s book Dark Money: The Hidden History of the Billionaires Behind the Rise of the Radical Right, the project features interviews with journalists including Mayer, as well as lawmakers, judges, FBI investigators, whistleblowers and insiders on both sides of the issue. —Matt Grobar, Deadline, 7 Apr. 2025

Chief Commercial Officer Matt Klein is also leaving and will be succeeded by insider Rana Ghosh. —Aatreyee Dasgupta, USA Today, 7 Apr. 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