Source : Webster's Revised Unabridged Dictionary (1913)

Quakerism \Quak"er*ism\, n.
   The peculiar character, manners, tenets, etc., of the
   Quakers.

Source : WordNet®

Quakerism
     n : the theological doctrine of the Society of Friends
         characterized by opposition to war and rejection of
         ritual and a formal creed and an ordained ministry