sphere
A surface in three dimensions consisting of all points equidistant from a center. .
Other meanings
An object which appears to be bounded by a sphere; a round object, a ball.
Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies
Word history
From Old French "sphere".
Where this comes from
This definition is adapted from “sphere” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.