Pi"e*tist (?), n. [Cf. G. pietist, F. pi'etiste. 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.
© Webster 1913.