# insider

Pronunciation: US say "in-SY-dur" /ɪnˈsaɪdɚ/; UK say "in-SY-duh" /ɪnˈsaɪdə/

## Noun

1. Someone within a group, organization, or institution who has special knowledge of its inner workings.
   - Simple: Someone who belongs to a group and knows secret or private details about how it works.
   - _Only an insider could have known the company planned to cut those jobs._
   - _Government insiders leaked the details of the proposed budget weeks early._
2. A person located within an enclosed space.
   - Simple: A person who is inside a closed or shut-in space.
   - _The firefighters called out to any insider still trapped in the building._
   - _Once the heavy doors sealed shut, the insiders had no way to signal for help._

## Origin

Formed from "inside" combined with the suffix "-er".

Source: DictionaryAI, https://dictionaryai.com/define/insider (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).