[f. prec. + -IST.] One who holds or advocates some conditional principle; in 17th c. one who held that the grace of God is dependent on conditions.
1678. T. J[ones], Brit. Ch., 584. Nor are the defenders of free grace … to reproach him streight for an Arminian, Pelagian, or our Conditionalists, or Moralists, for a Puritan.
