Definitions for "Portal Site"
Keywords:  msn, yahoo, aol, homepages, entry
A generic term for any site which provides an entry point to the internet for a significant number of users. Examples are search engines, directories, built-in default browser or service provider homepages, sites hardwired to browser buttons, sites offering free homepages, e-mail or personalised news and any popular (or heavily advertised) sites that significant numbers of people may bookmark or set as default pages.
Search engines, directories and service provider homepages are examples of this generic term. Basically, any site which provides an entry point to the internet for a significant number of users can be called a portal site.
a site that the owner positions as an entrance to other sites on the internet; "a portal typically has search engines and free email and chat rooms etc."