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

Analysts and insiders estimate the NFL's stake in ESPN could be worth between $2 billion and $3 billion. —Michael Ozanian, CNBC, 4 Sep. 2025

In order to do that, Jared Goff may have to have another MVP-caliber season, according to our Lions insider Rainer Sabin. —Christian Romo, Freep.com, 4 Sep. 2025

Now, government ethics experts and Democratic lawmakers are criticizing the family’s venture, citing potential conflicts of interest stemming from the Trumps’ regulatory influence and possible insider transactions. —Tasneem Nashrulla, semafor.com, 4 Sep. 2025

Iowa Republicans are no strangers to bruising primaries, and insiders caution against assuming a coronation. —Samantha-Jo Roth, The Washington Examiner, 3 Sep. 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