The network card on a computer is sometimes casually called network interface.
The point of interconnection between the public switched network[?] and a privately owned terminal. In the USA, Code of Federal Regulations, Title 47, part 68, stipulates the interface parameters.
The point of interconnection between one network and another network.
... to the outside of the body. The urethra has an excretory function in both sexes, to pass urine to the outside, and also a reproductive function in the male, as a passage ...