The difference between Domain and Sphere

Domain as a noun:

A geographic area owned or controlled by a single person or organization.

Domain as a noun:

A field or sphere of activity, influence or expertise.

Domain as a noun:

A group of related items, topics, or subjects.

Domain as a noun (mathematics):

The set of all possible mathematical entities (points) where a given function is defined.

Domain as a noun (mathematics, set theory):

The set of input (argument) values for which a function is defined.

Domain as a noun (mathematics):

A with no zero divisors; that is, in which no of nonzero elements is zero.

Domain as a noun (mathematics, topology, analysis):

An open and connected set in some topology. For example, the interval (0,1) as a subset of the real numbers.

Domain as a noun (computing, Internet):

Any DNS domain name, particularly one which has been delegated and has become representative of the delegated domain name and its subdomains.

Domain as a noun (computing, Internet):

A collection of DNS or DNS-like domain names consisting of a delegated domain name and all its subdomains.

Domain as a noun (computing):

A collection of information having to do with a domain, the computers named in the domain, and the network on which the computers named in the domain reside.

Domain as a noun (computing):

The collection of computers identified by a domain's domain names.

Domain as a noun (physics):

A small region of a magnetic material with a consistent magnetization direction.

Domain as a noun (computing):

Such a region used as a data storage element in a bubble memory.

Domain as a noun (data processing):

A form of technical metadata that represent the type of a data item, its characteristics, name, and usage.

Domain as a noun (taxonomy):

The highest rank in the classification of organisms, above kingdom; in the three-domain system, one of the taxa Bacteria, Archaea, or Eukaryota.

Domain as a noun (biochemistry):

A folded section of a protein molecule that has a discrete function.

Sphere as a noun (mathematics):

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 .

Sphere as a noun:

A spherical physical object; a globe or ball.

Sphere as a noun (astronomy, now, _, rare):

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

Sphere as a noun (historical, astronomy, mythology):

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).

Sphere as a noun (mythology):

An area of activity for a planet; or by extension, an area of influence for a god, hero etc.

Sphere as a noun (figuratively):

The region in which something or someone is active; one's province, domain.

Sphere as a noun (geometry):

The set of all points in three-dimensional Euclidean space (or n-dimensional space, in topology) that are a fixed distance from a fixed point .

Sphere as a noun (logic):

The extension of a general conception, or the totality of the individuals or species to which it may be applied.

Sphere as a verb (transitive):

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

Sphere as a verb (transitive):

To make round or spherical; to perfect.