Register Domain

The term domain name has multiple related meanings:
A name that identifies a computer or
computers on the internet. These
names appear as a component of a Web
site's URL, e.g. wikipedia.org. This
type of domain name is also called a hostname.
The product that domain name registrars
provide to their customers. These names
are often called registered domain names.
Names used for other purposes in the
Domain Name System (DNS), for example
the special name which follows the @
sign in an email address, or the Top-level
domain names like .com, or the names
used by the Session Initiation Protocol
(VoIP), or DomainKeys.