domain name
identification string that defines a realm of administrative autonomy, authority or control within the Internet
subdomain
DNS domains that are part of others
second-level domain
domain that is directly below a top-level domain
expired domain
expired in the domain registry
internationalized domain name
Internet domain name that contains at least one label that is displayed in software applications, in whole or in part, in a language-specific script or alphabet
third-level domain
domain that is directly below a second-level domain
domain hack
a domain that implements an appealing name using elements of the domain name system, such as top-level domain abbreviations
top-level domain
domain at the highest level of the DNS hierarchy
Fully qualified domain name
domain name that specifies its exact location in the tree hierarchy of the Domain Name System