Which term means moving an operating system from one hardware platform to another?

There is some confusion here. porting an operating system from one hardware to another: for example (I think) apple started on Motorola family MC64000, it moved to a Linux kernel to the X86 Intel family with Darwin OS, recently to RISC ARM architecture, laptops. Other OS's Linux based, BSD，... are ported to many architectures. Mostly related to kernels. A port, related to internet protocol (TCP) is a sub-address and tells the recipient to use: http, UDP, FTP protocols. unrelated.

Always considered a "port" as a communication platform between hardware.