Divination
Divination (from Latin divinatio, communication with the divine) is the practice of seeking knowledge of future events, things hidden or distant through ritual, oracular or symbolic methods. Universal phenomenon, present in all known cultures: Greek and Roman oracles, Chinese I Ching, African geomancy, Mesoamerican shamanism, Tarot, astrology, palmistry.
Classification of mantic arts
The Greeks distinguished artificial divination (by technique: oracles, augury, haruspicy) from natural (by inspiration: prophets, dreams, oracles in trance).