English Reference

Word

informant

Phoneticsin·for·mant, stress on the second syllable

US/ˌɪnˈfɔɹmənt/

UK/ɪnfˈɔːmənt/

Definitions

01police source

C1 · Advanced Countable noun Law Formal

n. someone who secretly gives information to the police or a government agency about illegal activities.

n. a person who provides privileged or confidential information about a person or organization to an agency, typically the police.

“The police caught the gang thanks to a secret informant who worked for them.”

“The detective refused to reveal the identity of his informant, fearing that any leak would compromise the ongoing undercover investigation.”

Synonyms

02linguistic source

C2 · Proficiency Countable noun Science Technical · Academic

n. a native speaker who provides information about their language to a researcher or student.

n. a native speaker who provides linguistic data, such as pronunciation and grammar judgments, to a researcher.

“The researcher spent months working with a local informant to document the dying language.”

“Field linguists rely on the intuitive judgments of the native informant to determine which syntactic structures are considered well-formed within the community.”

Usage

In modern linguistics, 'consultant' or 'language helper' is often preferred to avoid the negative connotations of the police sense.

Teaching tip

While historically standard in linguistics, this term is now often replaced by 'consultant' to avoid implying the person is a 'snitch'.

Synonyms

consultantlanguage assistant

Real-World Examples

“Sources include defectors, informants and individuals who remain embedded within movements while passing information to outsiders.”
The Conversation 31 Aug 2026
“In July, the court filing indicated that an unnamed FBI informant began communicating with Bowie through encrypted apps.”
Al Jazeera 20 Aug 2026

Etymology

From inform + -ant.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

Domain

Linguistics

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

QR code

englishreference.com/q/informant

English Reference