What is Divination?

Divination is a supernatural technique for obtaining information about things that are unknown, including events that will occur in the future. Divination can be either inspirational, noninspirational, fortuitous, or deliberate.

-> Inspirational divination—a type of divination that involves a spiritual experience,   such as a direct contact with a supernatural being (whether it be an ancestor, ghost, spirit, or god) through an altered state of consciousness. (Also known as emotive or natural divination)

-> Noninspirational divination—a form of divination that is performed without direct involvement of a supernatural being. (Also known as artificial divination). This includes the use of magic, oracles, or the reading of natural events.

-> Fortuitous divination—divination that simply occurs without any conscious effort.
This includes a sudden, unexpected vision or omen.
 
-> Deliberate divination—divination that someone intentionally sets out to do.
(e.g. aleuromancy, prophecy, medium, dowsing, astrology, palmisty, tarot cards, etc.)
 

                                                       Forms of Divination:

Aleuromancy—divination by the use of flour, as in fortune cookies.

Apantomancy—divination by a chance meeting with an animal. For instance, the Nandi of East Africa believe that if a rat crosses one’s path that is a good thing, but if a snake does, that is bad.
 
Astrology—the belief that all stars and planets, as well as the sun and moon, influence the destiny of people and that reading the sky can be used as a divination technique.
 
Cleromancy—divination by the casting of the lots such as the rolling of dice or the drawing of straws.
 
Dowsing—method of divination whereby water and other underground resources are located by use of forked stick.

Graphology—divination through handwriting analysis.

Haruspication—divination by the examination of the entrails of animals. Sometimes the animal is sacrificed or parts of it are examined to find answers. (Used in ancient Rome)

Mechanical divination—manipulating objects to find answers. (i.e. tarot cards, ouiji board, rune casting, etc.)

Medium—A practitioner who intentionally communicates with the supernatural to find information.

Necromancy—divination through contact with ancestors from the dead. Usually the diviner will enter a trance to communicate with the dead. However, in ancient Greece, when one died in a mysterious way, they believed that the spirits of the dead could show signs on the deceased one's body in order to communicate how he or she died or who killed them.
 
Oneiromancy—divination by the interpretation of dreams. Some believe that when we sleep, our souls leave our bodies. In dreams, the soul establishes a connection with the spiritual domain. One may be visited by another spirit or one may experience visions while his or her soul travels. All we must do is interpret our visions once our soul returns to our body.
 
Omen—a fortuitous happening or condition that provides information. For example, one can attain information by observing living or dead animals.
 
Oracle—a specific device that is used for divination

Ordeal—A trial by divination that is performed on the body of the accused person to determine guilt or innocence.
 
Ornithomancy—divination from reading the path and form of a flight of birds.
 
Palmistry—divination through reading the lines of the palm of the hand

Phrenology—divination through the study of the shape and structure of the head.

Presentiment—a feeling in an individual that something is about to occur.
 
Prophecy—divination through the communication of a prophet. Often the prophet receives information through a vision unexpectedly without any conscious intention.

Scapulamancy—a divination technique in which a dried scapula, or shoulder blade, is placed in a fire and the pattern of cracks and burns is interpreted.

Tasseography—divination through the reading of tea leaves.
                                             

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 Terms can be found in Rebecca & Philip L. Stein's The Anthropology of Religion, Magic, and Witchcraft