'Conspirator' definitions:

Definition of 'conspirator'

From: WordNet
noun
A member of a conspiracy [syn: conspirator, coconspirator, plotter, machinator]

Definition of 'Conspirator'

From: GCIDE
  • Conspirator \Con*spir"a*tor\, n. One who engages in a conspiracy; a plotter. --2 Sam. xv. 31. [1913 Webster]