We agree with others about the definition of portal which is an end-user interface that provides access to a variety of information, often via a web browser, and often tying together relational data from distributed sources, Portal is a door or gateway.

It provides access to specialized and focused information and links, it eliminates from our path information that is not relevant, is customized- user can specify its behaviour, appearance and content and also a portal is a one - to -one channel between the provider and the audience.

At last we summarized the portal with:
A web facility that provides access to specialized and focused information and links while filtering irrelevant information.
A Portal is dynamically tailored to the individual user.