Definitions of portal:

• noun:   a grand and imposing entrance (often extended metaphorically)

  Example: "The portals of the cathedral"

• noun:   a site that the owner positions as an entrance to other sites on the internet

  Example: "A portal typically has search engines and free email and chat rooms etc."

• noun:   a short vein that carries blood into the liver
• name:  A surname (very rare: popularity rank in the U.S.: #42463)