portal

US /ˈpɔːr.t̬əl/
UK /ˈpɔːr.t̬əl/
"portal" picture
1.

a doorway, gate, or other entrance, especially a large and imposing one

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The ancient temple had a grand stone portal.
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They passed through the ornate portal into the castle courtyard.
:
doorwayentrancegatearchwayentry
2.

a website or web page that acts as an entry point to other websites or information on the internet

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The university's student portal provides access to grades and course materials.
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Many companies use an internal portal for employee communication.
:
gatewayhubplatformwebsite
3.

a hypothetical or fictional opening, often in space or time, that allows passage to another dimension, world, or location

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In the fantasy novel, a magical portal transported the hero to a parallel universe.
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Scientists in the movie discovered a wormhole that acted as a portal to distant galaxies.
:
gatewayopeningpassagewormholedimension gate