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

Taught by the award-winning professionals who make Wynn one of the world’s most celebrated luxury resorts, these bespoke classes invite guests to step into roles usually reserved for insiders. —Michael Cappetta, Travel + Leisure, 1 Feb. 2026

During the closing ceremony of the Nordic Film Market, industry insiders could be heard whispering in every corner, trying to do just that. —Marta Balaga, Variety, 1 Feb. 2026

The insider also tells PEOPLE that Lauer has grown weary of the whole thing and has been trying to move on with his life alongside his longtime girlfriend, Shamin Abas. —Desiree Anello, PEOPLE, 1 Feb. 2026

To Lamont, the tell-tale sign of a bubble is equity issuance, when corporate executives, the ultimate insiders, rush to sell overvalued stock to the public. —Nick Lichtenberg, Fortune, 1 Feb. 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