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

However, the insider believes King Charles will lose this battle, as Camilla is reportedly very strong-minded. — Allison Degrushe, StyleCaster, 27 Sep. 2026

Analysts and diamond industry insiders recommend those stocks rather than investing in actual natural or lab-grown stones. — Liz Napolitano, CNBC, 26 Sep. 2026

Disney insiders are said to be viewing the book as a one-sided revisionist history. — Todd Spangler, Variety, 25 Sep. 2026

Industry insiders had been anticipating the younger Blavatnik’s entry into the company for years, and speculation of his impending appointment had been growing louder over the past several months. — Ethan Millman, HollywoodReporter, 25 Sep. 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