insider Definition in the Cambridge English Dictionary
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Definition of “insider” - English Dictionary

Definition of "insider" - American English Dictionary

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insidernoun [C]

 us   /ɪnˈsɑɪ·dər, ˈɪnˌsɑɪ-/
someone who is an ​acceptedmember of a ​group: His ​books have made him an insider in the ​musicworld.
(Definition of insider from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "insider" - British English Dictionary

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insidernoun [C]

uk   /ɪnˈsaɪ.dər/  us   /-dɚ/
someone who is an ​acceptedmember of a ​group and who ​therefore has ​special or ​secretknowledge or ​influence: According to insiders, the ​committee is having ​difficulty making up ​itsmind.
(Definition of insider from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "insider" - Business English Dictionary

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insidernoun [C]

uk   us   /ɪnˈsaɪdər/
WORKPLACE someone who is ​part of a ​group, or who ​works for a ​company or an ​organization and therefore has ​specialknowledge or ​influence: She has an insider's view of the often brutal nature of ​trading in the ​stockmarket. an industry insider
WORKPLACE, FINANCE someone who is in a high ​position in a ​company, or someone who ​owns ten or more ​percent of ​shares in a ​company: a company insider This ​formneeds to be ​filled out by any newly ​appointed corporate insider.
(Definition of insider from the Cambridge Business English Dictionary © Cambridge University Press)
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