insider

[in-sahy-der] / ˌɪnˈsaɪ dər /

NOUN

accessory

Synonyms

STRONG

abettor accomplice aid aide assistant associate colleague confederate conspirator helper partner plant ringer shill stall subordinate

WEAK

co-conspirator

Antonyms

STRONG

antagonist boss enemy foe leader opponent superior

WEAK

principal

NOUN

accomplice

Synonyms

STRONGEST

aide associate co-conspirator collaborator conspirator

STRONG

abettor accessory aid ally assistant colleague confederate partner plant stall

Antonyms

STRONG

antagonist enemy

WEAK

adversary opponent

NOUN

cognoscente

Synonyms

STRONG

connoisseur critic expert judge specialist

Antonyms

STRONG

ignoramus

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And a problem for market bulls is that such a capex reduction may coincide with two classic markers that Perkins believes usually accompany a market top: insider selling and monetary tightening.

From MarketWatch • Jun. 5, 2026

Rocket Lab stock fell 15% to $122.39 on Monday, following a rally in May and significant insider sales.

From Barron's • Jun. 3, 2026

DOJ is investigating former congressman George Santos for insider trading on Kalshi.

From MarketWatch • Jun. 3, 2026

One posted on LinkedIn about being sponsored for the event by Fatmir Mediu, an Albanian government official and longtime Fellowship insider.

From Salon • May 29, 2026

It was information only a highly placed insider could have acquired.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

insider

Example Sentences

Related Words