Used chiefly attributively; in general sense ‘relating to a gateway/entrance’ and in medicine ‘relating to the portal vein or portal system’
Definitions
Relating to or forming an entrance or gateway. The portal arch frames the doorway of the cathedral.
Medicine: relating to the portal vein or a portal system of veins. Portal circulation abnormalities can cause serious complications.
Computing: relating to an Internet portal or portal site. The company is developing a portal platform for enterprise customers.