ism Meaning, Definition & Usage

  1. noun a belief (or system of beliefs) accepted as authoritative by some group or school
    philosophical system; philosophy; school of thought; doctrine.

WordNet

Ism noun
Etymology
See ism, above.
Definitions
  1. A doctrine or theory; especially, a wild or visionary theory. E. Everett.
    The world grew light-headed, and forth came a spawn of isms which no man can number. S. G. Goodrich.

Webster 1913