Definitions of sphere:
- noun: any spherically shaped artifact
- noun: the geographical area in which one nation is very influential
- noun: a three-dimensional closed surface such that every point on the surface is equidistant from the center
- noun: a solid figure bounded by a spherical surface (including the space it encloses)
- noun: a particular environment or walk of life
Example: "His social sphere is limited"
- noun: a particular aspect of life or activity
- noun: the apparent surface of the imaginary sphere on which celestial bodies appear to be projected