domain

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

A field or sphere of activity, influence or expertise.

A group of related items, topics, or subjects.

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

The set A; The subset of A consisting of elements a of A such that there exists an element b in B with (a,b) in R.

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

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

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

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

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.