Most commonly, sphere refers to a ball-shaped object. However, there are alternate uses:

• Sphere Books was a British paperback publisher of the 1960s - 1980s.
• Sphere is the name of a book written by Michael Crichton, which was subsequently turned into a movie by the same name.
• Sphere is a cross platform, open source computer program used to make Role-playing games similar to those on the SNES console.
• A sphere of knowledge