crystal ball

Noun

crystal ball (plural crystal balls)

1. A globe of glass or crystal that is used to foretell the future.
   • The psychic looked into the crystal ball and saw into the future.
   • "Well, Victor agreed and Madame Rosita sat down with her crystal ball on a black cloth in front of her."1957, Sydney J. Bounds, The Robot Brains, London: Digit Books, page 31

   Synonyms:

   crystal sphere, orbuculum, seeing stone, shew stone, showstone, scrying stone

2. (broadly, figuratively) A manner or method of seeing into the future.
   • If her past is a crystal ball to her future, she will perhaps never be rich, even though she is a kind, hard-working person.
3. One of the magickal tools of Wicca, used for divination and altar purposes.