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

Jackson launched his bid as a relative unknown, though Capitol insiders knew him because of Jackson Healthcare, its lucrative state contracts and his lobbying interest in healthcare, business and tax policy. — ABC News, 24 Oct. 2026

The Duchess of Sussex was also concerned about the legal implications of publicly repeating unproven claims, the insider further explained. — Nicholas Rice, PEOPLE, 24 Oct. 2026

Here’s your insider rundown on what the inspectors loved at Charlotte’s newest spots in the Michelin Guide — and how to actually get in the door. — Heidi Finley, Charlotte Observer, 23 Oct. 2026

Although insiders said Wiseman had expressed a willingness to stay, and there had been discussions about her role at the combined company, Bloys’ new setup mostly keeps the HBO and HBO Max structure intact. — Michael Schneider, Variety, 23 Oct. 2026

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