A collection of brief and concise definitions of hard-to-find and hard-to-define terms used in Religious Mysticism, Esoteric Philosophy, Occultism, Psychical Research, Spiritualism, Alchemy, Astrology, in the Oriental philosophies of Buddhism, Brahmanism, Sufism, Lamaism, Zoroastrianism, Theosophy, Kabbalism, Magic and Demonology—and in all those philosophies, religions and doctrines which teach and recognize the influence of the superhuman and supernatural on man's everyday life and affairs. The book contains definitions of over 2200 terms—hundreds of which appear now for the first time in an English language dictionary.