a. rare. [f. CONSPIRATOR on L. type *conspīrātōri-us: see -ORY.] Pertaining to conspirators or to conspiracy.

1

1800.  W. Taylor, in Monthly Mag., XII. 98. Can it be said … of conspiratory clubs that they are capricious.

2

1882.  Contemp. Rev., Oct., 625. Conspiratory circles were formed.

3