Pietism :: Pietism (n.) The principle or practice of the Pietists.
Pietism :: Pietism (n.) Strict devotion; also, affectation of devotion..
Pietist :: Pietist (n.) 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.