v. i. [ imp. & p. p. Machinated p. pr. & vb. n. Machinating ] [ L. machinatus, p. p. of machinari to devise, plot. See Machine. ] To plan; to contrive; esp., to form a scheme with the purpose of doing harm; to contrive artfully; to plot. “How long will you machinate!” Sandys. [ 1913 Webster ]