noun
insider
ihn-SYD
noun
1
Someone with privileged knowledge of how a group or organization really operates.
"Only an insider could have leaked those documents."
"Industry insiders predicted the merger months in advance."
How to Use Insider
Learner’s notesIn plain EnglishSomeone who is part of a group and therefore knows things outsiders don't.
Easily confused with
Common pairings
industry insider
insider trading
insider knowledge
Word Forms
insiders plural
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Only an _____ could have leaked those documents.
Etymology
From inside + the agent suffix -er.