Definitions for "Subsite"
From Web Characterization Terminology & Definitions Sheet ( 1999-05-24) A cluster of Web pages within a Web site, that is maintained by a different publisher than that of the parent Web site, or host site. The subsite publisher exercises editorial control over the Web pages comprising the subsite, perhaps restrained by some broad guidelines imposed by the host site publisher.
a home environment for a specific class of users or a specific type of usage within a larger and more general site
a related site that belongs to the Government Offices but does not form part of the www
a distinct section of a website that might warrant its own navigational systems.