An opening in the side of a ship for entrance and exit, or for the loading and unloading of cargo; = "port". Now chiefly historical.
2In various types of machine, device, or apparatus: an aperture permitting influx of a substance, entrance of a source of energy, introduction of an instrument, etc.
rare The place where an infection or infectious agent enters the body; compare "port of entry".
Mid 18th century. From entry + port.
A harbour, airport, or border crossing through which people and goods may enter a country.
Mid 19th century; earliest use found in Boston Recorder. From entry + port.