a grand and imposing entrance (often extended metaphorically); the portals of the cathedral; the portals of heaven; the portals of success'

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.

[ Syn: portal site ]

a short vein that carries blood into the liver

[ Syn: portal vein , hepatic portal vein , vena portae ]