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[in-sahy-der] /ˌɪnˈsaɪ dər/

a person who is a member of a group, organization, society, etc.
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.
a person who has some special advantage or influence.
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.
a member of a specified group
a person with access to exclusive information

“one in possession of special information by virtue of being within some organization,” 1848, from inside + -er (1). Originally in reference to the stock markets.


A person who has special knowledge, authority, etc, because he is within or part of some privileged group: The insiders are saying that the President will veto it (1850+)


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  • Insider-trading

    noun 1. the illegal buying and selling of securities by persons acting on privileged information. The unlawful practice of using information that comes from a source “inside” the business but is not available to the general public to trade on the stock market. This activity is prohibited by law and is policed by the Securities […]

  • Insides

    [preposition in-sahyd, in-sahyd; adverb in-sahyd; noun in-sahyd; adjective in-sahyd, in-, in-sahyd] /preposition ˌɪnˈsaɪd, ˈɪnˌsaɪd; adverb ˌɪnˈsaɪd; noun ˈɪnˈsaɪd; adjective ˌɪnˈsaɪd, ˈɪn-, ˈɪnˌsaɪd/ preposition 1. on the inner or part of; within: inside the circle; inside the envelope. 2. prior to the elapse of; within: He promised to arrive inside an hour. adverb 3. or into […]

  • Inside skinny

    noun phrase by 1972 The confidential and little-known truth: This guy gave us the inside skinny on Prozac Related Terms skinny

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