"knowledge of the paranormal", as opposed to "knowledge of the measurable"
The term occult sciences was used in the 16th century to refer to astrology, alchemy, and natural magic. The term occultism emerged in 19th-century France, where it came to be associated with various French esoteric groups connected to Éliphas Lévi and Papus, and in 1875 was introduced into the English language by the esotericist Helena Blavatsky. Throughout the 20th century, the term was used idiosyncratically by a range of different authors, but by the 21st century was commonly employed – including by academic scholars of esotericism – to refer to a range of esoteric currents that developed in the mid-19th century and their descendants. Occultism is thus often used to categorise such esoteric traditions as Spiritualism, Theosophy, Anthroposophy, the Hermetic Order of the Golden Dawn, and New Age.
Particularly since the late twentieth century, various authors have used the occult as a substantivized adjective. In this usage, "the occult" is a category into which varied beliefs and practices are placed if they are considered to fit into neither religion nor science. "The occult" in this sense is very broad, encompassing such phenomenon as beliefs in vampires or fairies and movements like ufology and parapsychology. In that same period, occult and culture were combined to form the neologism occulture.
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Энциклопедическое изложение масонской, герметической, каббалистической и розенкрейцерской символической философии
Manly Palmer Hall