In language a door can be considered a synonym for portal. If an individual can open a door, then in the same context an individual can open a portal. A portal is simply a gateway, or entry-point, to another location.
The case is the wood that surrounds the opening, the portal is the actual opening.
The prefix for portal is "port-", which means a door or entrance.
A portal.
Portal door
a door
Opening, portal, hole, entrance.
He opened the portal to "Christmastown".
After you exit the portal, go to the other end of the room. There you will see a big door. On the door's left you can see a big machine. go to it and type in the numbers you've collected. Once this is done, the door will open!
its not exactly a portal its more like a door outside
An archway/door with a sculpted design with figures above it.
Barbican
You can keep a door open by using a door stopper, propping it open with an object, or installing a door wedge.