: 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
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
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