A combination of men for an evil purpose; an agreement, between two or more persons, to commit a crime in concert, as treason; a plot.
- An agreement to perform together an illegal, wrongful, or subversive act.
- A group of conspirators.
- Law An agreement between two or more persons to commit a crime or accomplish a legal purpose through illegal action.
- A joining or acting together, as if by sinister design: a conspiracy of wind and tide that devastated coastal areas.