\Pi"e*tist\, n. [Cf. G. pietist, F. pi['e]tiste. 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.