n. [ Cf. G. pietist, F. piétiste. See Piety. ] (Eccl. Hist.) One of a class of religious reformers in Germany in the 17th century who sought to revive declining piety in the Protestant churches; -- often applied as a term of reproach to those who make a display of religious feeling. Also used adjectively. [ 1913 Webster ]

{ } a. Of or pertaining to the Pietists; hence, in contempt, affectedly or demonstratively religious. Addison. [ 1913 Webster ]