Thesaurus.com
Dictionary.com
Showing results for insider. Search instead for insidor.
Definitions

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.

“It was not that important,” she said of her 2004 trial for acting on insider information and lying to federal prosecutors.

From Salon • Apr. 16, 2026

The last thing traders want is to be caught on the wrong side of insider bets.

From The Wall Street Journal • Apr. 14, 2026

Donna Bojarsky, a longtime Democratic political insider in Los Angeles, attended Swalwell fundraisers this year thrown by Hollywood business leaders.

From Los Angeles Times • Apr. 13, 2026

On Sunday he faces Peter Magyar, a former insider in Orban's party Fidesz, who broke with him two years ago to found the centre-right Tisza party.

From BBC • Apr. 6, 2026

It taught me that it is easier to be an insider as an outsider than to be an outsider as an insider.

From "Born a Crime: Stories from a South African Childhood" by Trevor Noah