English Reference

Word

conspiracy

Phoneticscon·spir·a·cy, stress on the second syllable

US/kənˈspɪɹəsi/

UK/kənspˈɪɹəsi/

Definitions

01illegal secret plan

B2 · Upper Intermediate Countable noun Law

n. a secret plan made by a group of people to do something illegal or harmful.

n. a secret agreement between two or more persons to perform an unlawful or harmful act; often used in legal contexts to describe the agreement itself as a crime.

“The police uncovered a conspiracy to steal millions of dollars from the national bank.”

“The defendants were charged with criminal conspiracy after investigators found encrypted messages detailing their plan to sabotage the competitor's infrastructure.”

Usage

Often used with the preposition 'to' followed by an infinitive verb, or 'against' followed by a person or entity.

02conspiracy theory

B2 · Upper Intermediate Countable noun Informal

n. a belief that a secret, powerful group is responsible for an event.

n. a hypothesis or belief alleging that a secret group is responsible for a specific event or situation; frequently used as a shorthand for 'conspiracy theory'.

“He spent all night reading a conspiracy about how the moon landing was fake.”

“The rise of social media has accelerated the spread of various conspiracies regarding global health initiatives and government surveillance.”

Teaching tip

While technically 'conspiracy' refers to the act, in modern informal English it is very common to use it to mean the 'theory' itself.

Synonyms

03linguistic convergence

C2 · Proficiency Countable noun Linguistics Technical · Academic

n. when different rules in a language lead to the same result.

n. a situation in which different phonological or grammatical rules within a language produce similar or related phonetic outcomes.

“The professor explained how a conspiracy of sound changes led to the loss of the final vowel.”

“In generative phonology, a conspiracy occurs when several distinct rules appear to be motivated by a single surface-level constraint.”

Usage

Used almost exclusively in academic papers or advanced linguistics lectures.

Synonyms

04a group of animals

C2 · Proficiency Countable noun Literary

n. the special name for a group of ravens or lemurs.

n. a collective noun used specifically for a group of ravens or, less commonly, lemurs.

“A conspiracy of ravens gathered in the old oak tree as the sun set.”

“The poet used the term 'a conspiracy of lemurs' to evoke a sense of mystery and secret communication among the forest creatures.”

Teaching tip

This is a 'term of venery' and is very rare in everyday speech; it is mostly found in trivia or poetic writing.

Synonyms

Collocations

Common phrases and expressions where native English speakers use the word “conspiracy” in context.

Verb

01. expose a conspiracy

“An investigative journalist managed to expose a conspiracy involving high-ranking officials.”

verb + noun

02. hatch a conspiracy

“The rebels met in secret to hatch a conspiracy to overthrow the government.”

verb + noun

03. uncover a conspiracy

“Detectives worked for months to uncover a conspiracy to rig the national election.”

verb + noun

Adjective

04. criminal conspiracy

“The three men were charged with criminal conspiracy to commit fraud.”

adj + noun

05. vast conspiracy

“He claimed there was a vast conspiracy to keep the truth about the technology hidden.”

adj + noun

Noun

06. conspiracy of silence

“There was a conspiracy of silence among the staff regarding the manager's behavior.”

noun + of + noun

07. conspiracy theory

“Many people believe the conspiracy theory that the moon landing was faked.”

noun + noun

Preposition

08. in a conspiracy

“Several bankers were involved in a conspiracy to manipulate interest rates.”

prep + noun

09. conspiracy theories

Real-World Examples

“It also fueled conspiracy theories from people who argued the article was being attacked “because if there was a cure for Covid then they couldn’t sell their vaccines”, he said.”
The Guardian 19 Aug 2026
“Because let’s face it, that is exactly what the most paranoid of fans will have expected somebody at the heart of a massive conspiracy to say.”
The Guardian 20 Aug 2026

Etymology

From Middle English conspiracie, from Anglo-Norman conspiracie, from Latin cōnspīrātiō, from conspire + -acy.

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

Word family

NOUN

conspiracy(B2)

Domains

LawLinguistics

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Common
Level
B2 · Upper IntermediateOxford
Updated

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