noun · 3 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
General-American:/ɪnˈsaɪdɚ/
General-American:/ˈɪnsaɪdɚ/
Southern-England:Recorded audio is listed in the source snapshot.
homophone: inciter
rhymes with -aɪdə(ɹ)
CMU ARPABET:IH2 N S AY1 D ER0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A person who has special knowledge about the inner workings of a group, organization, or institution.
Definition source: English Wiktionary via Wiktextract
Examples
Near-synonyms: initiate, old hand, habitué
Meaning relationships
Synonyms: initiate, old hand, habitué
Antonyms: outsider
2
noun
Meaning 2
A person who is within an enclosed space.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
an officer of a corporation or others who have access to private information about the corporation's operations
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: corporate executive, business executive
History
Etymology
Etymology tree Middle English ynneside English inside Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English insider From inside + -er.
Across languages
Translations
33 source translations are retained for this English entry.
Belarusian:
інса́йдэр
(insájder)
— person who has special knowledge
Chinese Mandarin:
內部的人 /内部的人
(nèibù de rén)
— person who has special knowledge
Dutch:
insider
— person who has special knowledge
Dutch:
ingewijde
— person who has special knowledge
Finnish:
sisäpiiriläinen
— person who has special knowledge
French:
initié
— person who has special knowledge
Georgian:
ინსაიდერი
(insaideri)
— person who has special knowledge
German:
Insider
— person who has special knowledge
German:
Eingeweihter
— person who has special knowledge
German:
Eingeweihte
— person who has special knowledge
Hebrew:
אִישׁ סוֹד
(ish sod)
— person who has special knowledge
Hungarian:
bennfentes
— person who has special knowledge
Hungarian:
beavatott
— person who has special knowledge
Hungarian:
belsős
— person who has special knowledge
Indonesian:
orang dalam
— person who has special knowledge
Italian:
iniziato
— person who has special knowledge
Italian:
basista
— person who has special knowledge
Italian:
addetto ai lavori
— person who has special knowledge
Japanese:
インサイダー
(insaidā)
— person who has special knowledge
Japanese:
内部の人
(naibu no hito)
— person who has special knowledge
Korean:
내부자
(naebuja)
— person who has special knowledge
Korean:
인사이더
(insaideo)
— person who has special knowledge
Russian:
инса́йдер
(insájdɛr)
— person who has special knowledge
Russian:
свой челове́к
(svoj čelovék)
— person who has special knowledge
Spanish:
insider (insáider)
— person who has special knowledge
Spanish:
adentrino
— person who has special knowledge
Spanish:
adentreño
— person who has special knowledge
Spanish:
dentreño
— person who has special knowledge
Swedish:
insider
— person who has special knowledge
Ukrainian:
інса́йдер
(insájder)
— person who has special knowledge
Finnish:
sisällä oleva
— person who is within an enclosed space
Hungarian:
benn/bent ülő
— person who is within an enclosed space
Italian:
internato
— person who is within an enclosed space
