Sphere

A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter .

A spherical physical object; a globe or ball.

The apparent outer limit of space; the edge of the heavens, imagined as a hollow globe within which celestial bodies appear to be embedded.

Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres).

To place in a sphere, or among the spheres; to ensphere.

To make round or spherical; to perfect.