• Scrying: a technique of producing visions of the future by gazing into a crystal ball, black mirror, bowl of water, hot coals from a fire, etc. [1]

This definition comes from Religious Tolerance, who are a good neutral source of information.

• (Scrying) practised by John Dee and Edward Kelley. From the English word descry, meaning to reveal, scrying is the art of clairvoyance achieved by concentrating on an object, usually one with a reflective or semi-reflective surface (typically a mirror, a crystal ball or water), until visions appear. [2]

The above definition comes from a Channel 4 documentary.

• Scrying is a form of divination, which involves prolonged gazing into a crystal, a pool of water, a black mirror, or similar surface, in order to obtain visions. The famous prognistor Nostradamus was said to have favored this method, using ink as a medium.

Pronunciation: Skrye-ing • (noun)

Also Known As: Mirror gazing, crystal gazing.

Alternate Spellings: Skrying [3]

This definition comes from About.com another acceptable source.

• The word 'scrying' comes from the archaic English word 'descry', meaning to see. It now has the restricted sense of seeing paranormal visions, usually of the future, by looking at an object with a polished surface or shiny surface. (Richard Cavendish from Encyclopedia of the Unexplained, Arkana, 1989.)

This definition is by Richard Cavendish, a highly renowned author on paranormal and occult subjects

• Scrying refers to looking into a clear or reflective surface such as water, glass, or crystals, and seeing images of past, present, or future events within. This is the method Nostradamus is believed to have used. [4]

This is a definition from the BBC online

All definitions I have found above are consistent and clear and are inline with my original edits. Please also note I have found no article that refers to dowsing as a form of scrying in any book or reputable website.