in·sid·er | \ (ˌ)in-ˈsī-dər , ˈin-ˌsī- \

Definition of insider 

: 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

The 53-year-old Kavanaugh is the consummate Washington insider, well-liked in the city’s legal community. James Hohmann, Washington Post, "The Daily 202: Kavanaugh’s paper trail makes his confirmation harder but ensures he’ll be reliably conservative," 10 July 2018 League insiders, and local business leaders, believe that new Panthers owner David Tepper will compare Bank of America Stadium with the NFL's newest stadiums, and decide whether more renovations — or a new stadium — are needed. Steve Harrison, charlotteobserver, "NFL stadiums are more luxurious than ever. Here's how the Panthers could keep up.," 5 July 2018 Facebook insiders, like founder Mark Zuckerberg, hold shares with 10 times the voting power of regular investors. Evan Horowitz,, "Public, private, now public again. Dell’s dance with investors makes sense," 2 July 2018 Behind-the-scene looks Many panels and workshops at KCON 2018 NY will give attendees a look inside the K-pop world and will feature sessions with producers, industry insiders, social media influencers, professional fans and a lot more. Tamar Herman, Billboard, "Everything You Need to Know Before KCON 2018 NY, From Red Velvet to Star Live Talk," 21 June 2018 The shift is driven partly by the popularity of mobile apps and touchscreens, industry insiders say, but also by emerging technologies like voice assistants. Lauren Goode, WIRED, "A New Era of Frankensoftware Is Upon Us," 13 June 2018 But even if the app uses a cryptographic hash or some other means to ensure that stored or transmitted audio fragments can’t be abused by company insiders or hackers (a major hypothetical), there are reasons users should reject this permission. Dan Goodin, Ars Technica, "This app in Google Play wants to use phone mics to enforce copyrights," 12 June 2018 To date, Uber has sold shares to savvy insiders, venture capitalists and private equity funds, who as of February valued the company at $72 million. Owen Thomas, San Francisco Chronicle, "Uber is branching out. Is it more like Amazon or Yahoo?," 26 Apr. 2018 In 14 years, the showcase has grown from a niche exhibition catering to NBA insiders into one of the three biggest events on the professional basketball calendar along with the NBA Finals and All-Star weekend. Kirk A. Bado, azcentral, "NBA Summer League bets on importance of engaging off the court," 11 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'insider.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of insider

1848, in the meaning defined above

Keep scrolling for more

Learn More about insider

Statistics for insider

Last Updated

1 Sep 2018

Look-up Popularity

Time Traveler for insider

The first known use of insider was in 1848

See more words from the same year

Keep scrolling for more

More Definitions for insider



Financial Definition of insider

What It Is

An insider is an employee, director or any other person who is privy to confidential, nonpublic information about a company.

How It Works

Given their position, managers and executives within a company are privy to information about a company's operations that is not available to the investing public. The news and details of an upcoming merger or special dividend that have not yet been announced are two examples of insider information. Once information has been made public by the company, it is no longer considered "insider" information.

Why It Matters

Individuals with access to insider information have an unfair advantage in the market. Using this information to base a trade is an illegal practice known as "insider trading."

It is also illegal for a person with insider information to pass it to a third party so that they may use the information to profit.

Source: Investing Answers



English Language Learners Definition of insider

: a person who belongs to a group or organization and has special knowledge about it


in·sid·er | \ in-ˈsī-dər \

Kids Definition of insider

: a member of a group or organization who has information about it

Keep scrolling for more



Legal Definition of insider 

: 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

Keep scrolling for more

More from Merriam-Webster on insider

See words that rhyme with insider

Spanish Central: Translation of insider

Nglish: Translation of insider for Spanish Speakers

Comments on insider

What made you want to look up insider? Please tell us where you read or heard it (including the quote, if possible).


a magnificent or impressive array

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!