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

But insiders told Rob Shuter, the Naughty But Nice podcast author, that the morning show co-host wouldn’t publicly defend her friend against orders from CBS executives for her show to ignore mention of his final show or his departure from the network. —Martha Ross, Mercury News, 28 May 2026

According to industry insider Rob Shuter, the ceremony—held on the 38-acre private island Little Pipe Cay—was a lavish gift from billionaire family friends with close connections to Anderson. —Allison Degrushe, StyleCaster, 28 May 2026

That is, short sellers help create trading volume and price action, while management can use that liquidity to issue shares or raise capital that primarily benefits insiders. —David Capablanca, Forbes.com, 28 May 2026

Party insiders give Schwarze the edge for the endorsement, but Tafoya is expected to continue to the primary regardless of the outcome. —Liz Christy, CBS News, 28 May 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