A con·spir·a·cy\kən-ˈspir-ə-sē\noun

: a secret plan made by two or more people to do something that is harmful or illegal

: the act of secretly planning to do something that is harmful or illegal

Full Definition

1 : the act of conspiring together <They were accused of conspiracy to commit murder.>

2 a : an agreement among conspirators <uncovered a conspiracy against the government>

b : a group of conspirators <a conspiracy made up of disgruntled aristocrats>

Other forms: plural con·spir·a·cies

Examples

The CIA uncovered a conspiracy against the government.

They were accused of conspiracy to commit murder.

Origin: Middle English conspiracie, from Latin conspirare see conspire.

First use: 14th century

Synonyms: cabal, 1ring, crew, gang, Mafia, mob, syndicate