The Oxford Thesaurus An A-Z Dictionary of Synonyms - occultadj.

1) secret, dark, concealed, private, privy, hidden, obscure, veiled, obscured, shrouded, vague, abstruse, shadowy, mystical, mysterious, cabbalistic, esoteric, recondite, arcane: Printing was kept an occult art for generations. 2) magical, mystical, alchemic(al) , unexplained, unexplainable, inexplicable, puzzling, baffling, perplexing, mystifying, mysterious, incomprehensible, inscrutable, indecipherable, impenetrable, unfathomable, transcendental, supernatural, preternatural, mystic: They dress in odd clothes and participate in occult rituals at peculiar times of the day and night. --n. 3) Usually, the occult. the supernatural, the unknown, the black arts; arcana, cabbala or cabala or kabbala; cabbalism or cabalism or kabbalism, occultism, sorcery, witchcraft, black magic: Keith has studied the occult for many years.