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

The Prince and Princess of Wales, along with their three children — Prince George, 11, Princess Charlotte, 10, and Prince Louis, 7 — are loving the pups so far and hope to keep them, the insider added. —Charmaine Patterson, People.com, 24 May 2025

As the years passed, there were more rich insiders, with a new generation getting MBAs, starting brands, managing the family business and making millions. —Samantha Conti, Footwear News, 24 May 2025

According to Skin Care Experts Vogue Shopping The insider’s guide to what to shop and how to wear it. —Deanna Pai, Vogue, 22 May 2025

The public’s hostile reaction to Thompson’s death did not surprise many industry insiders. —Annika Kim Constantino,ashley Capoot, CNBC, 22 May 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