insider

American  

[in-sahy-der] / ˌɪnˈsaɪ dər /

noun

1. a person who is a member of a group, organization, society, etc.

2. a person belonging to a limited circle of persons who understand the actual facts in a situation or share private knowledge.

   Insiders knew that the president would veto the bill.

3. a person who has some special advantage or influence.

4. a person in possession of corporate information not generally available to the public, as a director, an accountant, or other officer or employee of a corporation.

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insider British  

/ ˌɪnˈsaɪdə /

noun

1. a member of a specified group

2. a person with access to exclusive information

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Etymology

Origin of insider

First recorded in 1820–30; inside + -er ¹

Example Sentences

The diaries provide an insider’s view of the Chinese Communist Party.

From The Wall Street Journal

Politico has named Jonathan Greenberger as its new editor in chief, selecting an insider to lead the political publication and to continue to grow its footprint around the world.

From The Wall Street Journal

When a corporate insider like an executive or a board member buys stock on the open market, that can be interpreted as a signal of confidence in a company’s future direction.

From MarketWatch

As for specific rules, we certainly support strong rules that limit manipulation, insider trading, or other forms of abuse that can undermine the integrity of these markets.

From Barron's

The order addresses concerns that platforms like Kalshi and Polymarket can be exploited by insiders, prompting both to update trading policies.

From The Wall Street Journal

Related Words

• aide
• associate
• co-conspirator
• collaborator
• conspirator