Portal

Web portal
Commonly referred to as simply a portal, a Web site or service that offers a broad array of resources and services, such as e-mail, forums, search engines, and on-line shopping malls. The first Web portals were online services, such as AOL, that provided access to the Web, but by now most of the traditional search engines have transformed themselves into Web portals to attract and keep a larger audience.

Noun
1.
portal - a grand and imposing entrance (often extended metaphorically); "the portals of the cathedral"; "the portals of heaven"; "the portals of success"
entrance, entranceway, entryway, entree, entry - something that provides access (entry or exit); "they waited at the entrance to the garden"; "beggars waited just outside the entryway to the cathedral"

2.
portal - 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."
portal site
internet site, web site, site - a computer connected to the internet that maintains a series of web pages on the World Wide Web; "the Israeli web site was damaged by hostile hackers"

3.
portal - a short vein that carries blood into the liver
hepatic portal vein, portal vein, vena portae
portal system - system of veins that carry blood from the abdominal organs to the liver
vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; all veins except the pulmonary carry unaerated blood

por·tal
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(pôr tl, p r -)
n.
1. A doorway, entrance, or gate, especially one that is large and imposing.
2. An entrance or a means of entrance: the local library, a portal of knowledge.
3. The portal vein.
4. A website considered as an entry point to other websites, often by being or providing access to a search engine.
adj.
1. Of or relating to the portal vein or the portal system.
2. Of or relating to a point of entrance to an organ, especially the transverse fissure of the liver, through which the blood vessels enter.