What is the prefix meaning of port?

The prefix "port" actually doesn't have a specific meaning on its own. It's often a shortened form of the Latin word "porta" which means "gate" or "door".

Here are some examples:

* Portable: Capable of being carried, like a gate that can be moved.

* Portal: A doorway or gate that leads to another place, often virtual.

* Import: To bring something in, like goods entering through a gate.

* Export: To send something out, like goods leaving through a gate.

So, while "port" itself isn't a standalone prefix, it often derives from the Latin "porta," which has the meaning of "gate" or "door."