# CID

/ˈsɪd/ (US) · CEFR C1 · Noun

Source: https://englishreference.com/word/cid
Updated: 2026-05-09

## Definition

Stands for Criminal Investigation Department. A special department in the British police that investigates serious crimes. You usually see this name in detective stories or news reports about major investigations.

For teachers: Abbreviation for Criminal Investigation Department. The Criminal Investigation Department of a British police force, responsible for investigating serious or complex crimes. Often used without an article when referring to the department as an entity.

## Examples

- The detective works for the CID in London.
- After the robbery was reported, officers from the CID arrived to collect forensic evidence and interview witnesses.
- Although uniform officers were first on the scene, the complexity of the case required the immediate involvement of the CID to oversee the long-term investigation.

## Usage notes

- Typically used with the definite article ('the CID') or as a modifier ('a CID officer').

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.